Re-vendor the canonical files from sneak/prompts at dd4027b (closes #112 )

The shared files are fetched from sneak/prompts dd4027b, with this repository's own entries after the shared content in .gitignore, .editorconfig and .dockerignore. Lint and tests are Dockerfile phases (golangci-lint v2.14.0, Debian Go 1.24.13) that the build stage depends on, and the Makefile targets call the script/ entrypoints. make fmt also formats Markdown with prettier. Fixes for the new lint findings: the auth cookie is always Secure, an IRC connection's relay goroutine stops when the connection closes, and repeated strings are constants. Model: opus-5-5
2026-10-06 08:35:46 +00:00
45 changed files with 2753 additions and 1420 deletions
@@ -1,10 +1,80 @@
-# .git is sent so the build can stamp the version, without its config.
-.git/config
-*.md
-!README.md
-neoircd
-neoirc-cli
-data.db
-data.db-wal
-data.db-shm
-.env
+# .dockerignore does NOT use .gitignore semantics. Docker matches with
+# moby/patternmatcher: filepath.Match plus `**`, so `*` does not cross
+# `/` and an unprefixed pattern is anchored at the context root. Every
+# depth-independent pattern therefore needs `**/`, or `config/.env` and
+# `certs/server.key` still ship while this file reads as solved. Only
+# genuinely root-anchored entries go unprefixed. Never transplant these
+# into .gitignore, where `**/` is wrong.
+#
+# Matching is case-sensitive, so secrets use character ranges rather
+# than an ALL-CAPS twin, which would still miss `Server.Key`.
+#
+# Extend with this repo's own host-built artifacts, written anchored:
+# `/myapp`, never `**/myapp`, which also matches `cmd/myapp/` and
+# deletes the package directory from the context.
+
+# .git is sent without its config. Without a VERSION build argument the
+# stage that compiles runs `git describe --tags --always` on .git, which
+# does not need .git/config; that file can hold a credential, such as a
+# password in a remote URL or the token the CI checkout step stores there.
+# Each submodule keeps a config with the same exposure in its git directory
+# under .git/modules/, nested again for a submodule's own submodules, or in
+# its own .git directory when it keeps one.
+# KNOWN GAP: a submodule whose name has a `config` segment (`config`,
+# `deploy/config`, `config/lib`) loses its whole git directory, because
+# `**/.git/modules/**/config` also matches that segment's directory
+# under .git/modules/. Go's version stamping then fails the build;
+# nothing leaks. Name such a submodule without that segment:
+# `git submodule add --name`.
+**/.git/config
+**/.git/modules/**/config
+
+# Agent scratch: one full checkout of the repo per in-flight agent.
+# Anchored because it occurs once where agents run at the repo root.
+# KNOWN GAP: a repo running agents in subdirectories still ships
+# `services/api/.claude/` and must add its own anchored entry.
+.claude
+
+# Environment files. `*.env` covers bare `.env` and the `prod.env`
+# convention. Re-include a committed template with a negation if the
+# build needs one: `!docs/example.env`.
+**/*.[eE][nN][vV]
+**/.[eE][nN][vV].*
+**/.[eE][nN][vV][rR][cC]
+
+# Private keys and the bundles carrying them. Public certificates
+# (*.crt, *.cer) are deliberately absent: they are legitimate inputs.
+**/*.[pP][eE][mM]
+**/*.[kK][eE][yY]
+**/*.[pP]12
+**/*.[pP][fF][xX]
+**/[iI][dD]_[rR][sS][aA]
+**/[iI][dD]_[dD][sS][aA]
+**/[iI][dD]_[eE][cC][dD][sS][aA]
+**/[iI][dD]_[eE][cC][dD][sS][aA]_[sS][kK]
+**/[iI][dD]_[eE][dD]25519
+**/[iI][dD]_[eE][dD]25519_[sS][kK]
+
+# Dependencies: restored inside the image, never copied in.
+**/node_modules
+
+# OS metadata.
+**/.DS_Store
+**/Thumbs.db
+
+# Editor state: never a build input, and it churns COPY.
+**/*.swp
+**/*.swo
+**/*~
+**/*.bak
+**/.idea
+**/.vscode
+**/*.sublime-*
+
+# This repository's host-built artifacts: the binaries, and the database
+# a local run writes.
+/neoircd
+/neoirc-cli
+/data.db
+/data.db-wal
+/data.db-shm
@@ -10,3 +10,8 @@ insert_final_newline = true

 [Makefile]
 indent_style = tab
+
+# This repository's own entries, after the shared content above.
+
+[*.go]
+indent_style = tab
@@ -6,4 +6,4 @@ jobs:
        steps:
            # actions/checkout v4.2.2, 2026-02-22
            - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
-            - run: docker build .
+            - run: script/cibuild
@@ -11,19 +11,48 @@ Thumbs.db
 .vscode/
 *.sublime-*

+# Agent scratch (worktrees of this repo, created and destroyed by
+# in-flight tooling). Unanchored: .gitignore patterns already match at
+# every depth, so no prefix is wanted here. This is not a .dockerignore
+# entry and must not be given a `**/` prefix on the way into one.
+.claude/
+
 # Node
 node_modules/

-# Environment / secrets
-.env
-.env.*
-*.pem
-*.key
+# Secrets. Unanchored like every entry above, so each matches at every
+# depth. Matching is case-sensitive on Linux, so names use character
+# ranges rather than a lowercase form that misses `Server.Key`.
+
+# Environment files. `*.env` covers bare `.env` and the `prod.env`
+# convention. Only the templates `example.env` and `sample.env` are
+# re-included below. A repository that commits any other template adds
+# its own negation after these lines, for example `!.env.example`.
+*.[eE][nN][vV]
+.[eE][nN][vV].*
+.[eE][nN][vV][rR][cC]
+!example.env
+!sample.env
+
+# Private keys and the bundles carrying them.
+*.[pP][eE][mM]
+*.[kK][eE][yY]
+*.[pP]12
+*.[pP][fF][xX]
+[iI][dD]_[rR][sS][aA]
+[iI][dD]_[dD][sS][aA]
+[iI][dD]_[eE][cC][dD][sS][aA]
+[iI][dD]_[eE][cC][dD][sS][aA]_[sS][kK]
+[iI][dD]_[eE][dD]25519
+[iI][dD]_[eE][dD]25519_[sS][kK]
+
+# This repository's own entries, after the shared content above.

 # Build artifacts
 web/dist/
-/neoircd
 /bin/
+/neoircd
+/neoirc-cli
 *.exe
 *.dll
 *.so
@@ -32,8 +61,6 @@ web/dist/
 *.out
 vendor/

-# Project
+# Local database and logs
 data.db
-debug.log
-/neoirc-cli
-web/node_modules/
+*.log
@@ -1,13 +1,30 @@
 version: "2"

+# Config schema uses the golangci-lint v2 layout (settings live under
+# linters.settings, not top-level linters-settings) so that the
+# thresholds below are actually applied by golangci-lint >= v2.
+
 run:
  timeout: 5m
  modules-download-mode: readonly

 linters:
  default: all
+  enable:
+    # Successor to the deprecated gomodguard. Named explicitly, rather than
+    # left to `default: all`, because it carries the module policy below.
+    - gomodguard_v2
  disable:
-    - wsl  # Deprecated in v2, replaced by wsl_v5
+    # Genuinely incompatible with project patterns
+    - exhaustruct      # Requires all struct fields
+    - exhaustruct_v5   # Requires all struct fields (successor to exhaustruct)
+    - godot            # Requires comments to end with periods
+    - wrapcheck        # Too verbose for internal packages
+    - varnamelen       # Short names like db, id are idiomatic Go
+    # Deprecated: the warning is attached to the old name, so it is
+    # silenced by disabling that name, not by enabling the successor.
+    - wsl              # Deprecated, replaced by wsl_v5
+    - gomodguard       # Deprecated, replaced by gomodguard_v2
  settings:
    lll:
      line-length: 88
@@ -18,19 +35,65 @@ linters:
      max-complexity: 15
    dupl:
      threshold: 100
-    gosec:
-      excludes:
-        - G704
    depguard:
+      # Test-support code must not be compiled into the shipped binary. A
+      # test-support package exists to hand a test privileges the program
+      # itself must never have, so a file that is not a test must not import
+      # one. Test files, and the files inside a package whose directory name
+      # ends in `test`, are where that code belongs, and are exempt.
+      #
+      # The deny list below is the one part of this file a repository is
+      # expected to extend, and the only part it may. depguard matches an
+      # import path against a list of prefixes, so it cannot be told "any path
+      # whose last segment ends in test"; a repository's own test-support
+      # packages have to be named here one at a time, by full import path,
+      # under a module path that differs from repository to repository. Add
+      # them; change nothing else.
      rules:
-        all:
+        test-support:
+          list-mode: lax
+          files:
+            - "$all"
+            - "!$test"
+            - "!**/*test/**"
          deny:
-            - pkg: "io/ioutil"
-              desc: "Deprecated; use io and os packages."
-            - pkg: "math/rand$"
-              desc: "Use crypto/rand for security-sensitive code."
+            - pkg: net/http/httptest
+              desc: >-
+                Test-support code belongs in test files and in packages whose
+                directory name ends in test, not in the shipped binary.
+    # Only decisions already recorded in the Go package defaults are
+    # listed here. Every entry matches the module path exactly.
+    gomodguard_v2:
+      blocked:
+        - module: github.com/rs/zerolog
+          recommendations:
+            - log/slog
+          reason: "Structured logging is stdlib log/slog."
+        # One entry per pre-fork module path, because the later releases
+        # are separate paths. A prefix match would be shorter but would
+        # also reach github.com/go-redis/redismock, the test double for
+        # the successor these entries recommend.
+        - module: github.com/go-redis/redis
+          recommendations:
+            - github.com/redis/go-redis/v9
+          reason: "Pre-fork module; use the maintained go-redis v9."
+        - module: github.com/go-redis/redis/v7
+          recommendations:
+            - github.com/redis/go-redis/v9
+          reason: "Pre-fork module; use the maintained go-redis v9."
+        - module: github.com/go-redis/redis/v8
+          recommendations:
+            - github.com/redis/go-redis/v9
+          reason: "Pre-fork module; use the maintained go-redis v9."
+        - module: github.com/sergi/go-diff
+          recommendations:
+            - github.com/aymanbagabas/go-udiff
+          reason: "No unified diff output; use go-udiff."
+        - module: github.com/hexops/gotextdiff
+          recommendations:
+            - github.com/aymanbagabas/go-udiff
+          reason: "Unmaintained fork; use go-udiff."

 issues:
-  exclude-use-default: false
  max-issues-per-linter: 0
  max-same-issues: 0
@@ -0,0 +1,2 @@
+node_modules/
+yarn.lock
@@ -0,0 +1,4 @@
+{
+    "tabWidth": 4,
+    "proseWrap": "always"
+}
@@ -2,10 +2,12 @@

 ## Before Every Commit

-1. **Format**: `gofmt -s -w .` and `goimports -w .`
-2. **Lint**: `golangci-lint run --config .golangci.yml ./...` — zero issues
-3. **Test**: `go test -race ./...` — all passing
-4. **Build**: `go build ./cmd/neoircd` — compiles clean
+1. **Format**: `make fmt`
+2. **Check**: `make check` — the tests and the linter, which run in Docker, and
+   the format check: all passing, zero issues
+
+Never run `go test`, `golangci-lint` or `gofmt` directly; use the `make`
+targets.

 No commit lands on main with lint errors, test failures, or formatting issues.

@@ -1,6 +1,8 @@
 # Go HTTP Server Conventions

-This document defines the architectural patterns, design decisions, and conventions for building Go HTTP servers. All new projects must follow these standards.
+This document defines the architectural patterns, design decisions, and
+conventions for building Go HTTP servers. All new projects must follow these
+standards.

 ## Table of Contents

@@ -84,10 +86,11 @@ project-root/

 ### Key Principles

-   **`cmd/{appname}/`**: Only the entry point. Minimal logic, just bootstrapping.
-   **`internal/`**: All application packages. Not importable by external projects.
-   **One package per concern**: config, database, handlers, middleware, etc.
-   **Flat handler files**: One file per handler or logical group of handlers.
+- **`cmd/{appname}/`**: Only the entry point. Minimal logic, just bootstrapping.
+- **`internal/`**: All application packages. Not importable by external
+  projects.
+- **One package per concern**: config, database, handlers, middleware, etc.
+- **Flat handler files**: One file per handler or logical group of handlers.

 ---

@@ -188,7 +191,8 @@ Providers are resolved automatically by fx, but conceptually follow this order:
 2. `logger.New` - Logger (depends on Globals)
 3. `config.New` - Configuration (depends on Globals, Logger)
 4. `database.New` - Database (depends on Logger, Config)
-5. `healthcheck.New` - Health check (depends on Globals, Config, Logger, Database)
+5. `healthcheck.New` - Health check (depends on Globals, Config, Logger,
+   Database)
 6. `middleware.New` - Middleware (depends on Logger, Globals, Config)
 7. `handlers.New` - Handlers (depends on Logger, Globals, Database, Healthcheck)
 8. `server.New` - Server (depends on all above)
@@ -452,11 +456,11 @@ func New(lc fx.Lifecycle, params HandlersParams) (*Handlers, error) {
 ### Closure-Based Handler Pattern

 For JSON route handlers, both the request and the response structures are
-defined in the scope of the method that returns the HandlerFunc.  They can
-be called simply `Request` and `Response` or slightly more descriptive
-names.
+defined in the scope of the method that returns the HandlerFunc. They can be
+called simply `Request` and `Response` or slightly more descriptive names.

-All handlers return `http.HandlerFunc` using the closure pattern. This allows initialization logic to run once when the handler is created:
+All handlers return `http.HandlerFunc` using the closure pattern. This allows
+initialization logic to run once when the handler is created:

 ```go
 // internal/handlers/index.go
@@ -517,10 +521,11 @@ func (s *Handlers) decodeJSON(w http.ResponseWriter, r *http.Request, v interfac

 ### Handler Naming Convention

-   `HandleIndex()` - Main page
-   `HandleLoginGET()` / `HandleLoginPOST()` - Form handlers with HTTP method suffix
-   `HandleNow()` - API endpoints
-   `HandleHealthCheck()` - System endpoints
+- `HandleIndex()` - Main page
+- `HandleLoginGET()` / `HandleLoginPOST()` - Form handlers with HTTP method
+  suffix
+- `HandleNow()` - API endpoints
+- `HandleHealthCheck()` - System endpoints

 ---

@@ -741,7 +746,8 @@ func New(lc fx.Lifecycle, params ConfigParams) (*Config, error) {

 1. **Environment variables** (highest priority via `AutomaticEnv()`)
 2. **`.env` file** (loaded via `godotenv/autoload` import)
-3. **Config files**: `/etc/{appname}/{appname}.yaml`, `~/.config/{appname}/{appname}.yaml`
+3. **Config files**: `/etc/{appname}/{appname}.yaml`,
+   `~/.config/{appname}/{appname}.yaml`
 4. **Defaults** (lowest priority)

 ### Environment Loading
@@ -8,41 +8,57 @@ COPY web/src/ src/
 COPY web/build.sh build.sh
 RUN sh build.sh

-# Lint stage — fast feedback on formatting and lint issues
-# golangci/golangci-lint:v2.1.6, 2026-03-02
-FROM golangci/golangci-lint@sha256:568ee1c1c53493575fa9494e280e579ac9ca865787bafe4df3023ae59ecf299b AS lint
+# Lint phase, built alone by script/lint. The linter is invoked directly
+# rather than through `make lint`, which is itself a docker build and
+# would recurse into a daemon that does not exist in a build step.
+# golangci/golangci-lint:v2.14.0, 2026-10-06
+FROM golangci/golangci-lint@sha256:ad862ba6b3798cbe0fd9fd7408d498fd74fbd2623a92406b2fd3898faf0bf98f AS lint
 WORKDIR /src
 COPY go.mod go.sum ./
 RUN go mod download
 COPY . .
-# Create placeholder files so //go:embed dist/* in web/embed.go resolves
-# without depending on the web-builder stage (lint should fail fast)
+# Placeholder files so //go:embed dist/* in web/embed.go resolves
+# without waiting for the web-builder stage. The test phase does the same.
 RUN mkdir -p web/dist && touch web/dist/index.html web/dist/style.css web/dist/app.js
-RUN make fmt-check
-RUN make lint
+RUN golangci-lint run --config .golangci.yml ./...

-# Build stage
+# Test phase, built alone by script/test. -race needs cgo and so a C
+# compiler, which the Debian Go image ships and the alpine one does not.
+# -p 4 runs at most four test binaries at once: under -race each one
+# costs a few hundred MB, and the default is one per core.
+# golang:1.24.13-bookworm, 2026-10-06
+FROM golang@sha256:1a6d4452c65dea36aac2e2d606b01b4a029ec90cc1ae53890540ce6173ea77ac AS test
+WORKDIR /src
+COPY go.mod go.sum ./
+RUN go mod download
+COPY . .
+RUN mkdir -p web/dist && touch web/dist/index.html web/dist/style.css web/dist/app.js
+RUN go test -p 4 -timeout 90s -race -cover ./... || \
+    { echo "--- Rerunning with -v for details ---"; \
+      go test -p 4 -timeout 90s -race -v ./...; exit 1; }
+
+# Build stage. Nothing is wanted from either phase above; the copies
+# are what make BuildKit build them first, so this stage cannot run
+# unless lint and test passed.
 # golang:1.24-alpine, 2026-02-26
 FROM golang@sha256:8bee1901f1e530bfb4a7850aa7a479d17ae3a18beb6e09064ed54cfd245b7191 AS builder
-WORKDIR /src
-RUN apk add --no-cache git build-base make
-
-# Force BuildKit to run the lint stage before proceeding
 COPY --from=lint /src/go.sum /dev/null
-
+COPY --from=test /src/go.sum /dev/null
+RUN apk add --no-cache git
+# A tar-stream context keeps the sender's file owners, which git refuses.
+RUN git config --system --add safe.directory /src
+WORKDIR /src
 COPY go.mod go.sum ./
 RUN go mod download
-
 COPY . .
 COPY --from=web-builder /web/dist/ web/dist/

-RUN make test
-
 # Build static binaries (no cgo needed at runtime — modernc.org/sqlite is pure Go)
 #
 # neoircd is stamped with the VERSION build arg when one is given, otherwise
-# with the tag or short commit from the .git in the build context. With .git
-# present, a version that is still empty, dev or unknown fails the build.
+# with `git describe --tags --always` on the .git in the build context. With
+# .git present, a version that is still empty, dev or unknown fails the build:
+# git is missing or could not read the checkout.
 ARG VERSION
 RUN VERSION="${VERSION:-$(git describe --tags --always)}"; \
    if [ -e .git ]; then \
@@ -54,7 +70,8 @@ RUN VERSION="${VERSION:-$(git describe --tags --always)}"; \
    CGO_ENABLED=0 go build -trimpath -ldflags="-s -w -X main.Version=${VERSION}" -o /neoircd ./cmd/neoircd/
 RUN CGO_ENABLED=0 go build -trimpath -ldflags="-s -w" -o /neoirc-cli ./cmd/neoirc-cli/

-# Runtime stage
+# Runtime stage, and the last one: a plain `docker build .` builds this
+# stage's chain and nothing else.
 # alpine:3.21, 2026-02-26
 FROM alpine@sha256:c3f8e73fdb79deaebaa2037150150191b9dcbfba68b4a46d70103204c53f4709
 RUN apk add --no-cache ca-certificates \
@@ -1,15 +1,25 @@
-.PHONY: all build lint fmt fmt-check test check clean run debug docker hooks ensure-web-dist
+.PHONY: all bootstrap setup build lint fmt fmt-check test check clean run debug docker hooks ensure-web-dist

 BINARY := neoircd
 VERSION := $(shell git describe --tags --always --dirty 2>/dev/null || echo "dev")
 LDFLAGS := -X main.Version=$(VERSION)

+# The standard targets are thin shims; the implementations live in
+# script/ per the scripts-to-rule-them-all pattern (see the Entrypoints
+# section of README.md).
+
 all: check build

+bootstrap:
+	@script/bootstrap
+
+setup:
+	@script/setup
+
 # ensure-web-dist creates placeholder files so //go:embed dist/* in
 # web/embed.go resolves without a full Node.js build.  The real SPA is
 # built by the web-builder Docker stage; these placeholders let
-# "make test" and "make build" work outside Docker.
+# "make build" work outside Docker.
 ensure-web-dist:
 	@if [ ! -d web/dist ]; then \
 		mkdir -p web/dist && \
@@ -20,25 +30,20 @@ ensure-web-dist:
 build: ensure-web-dist
 	go build -ldflags "$(LDFLAGS)" -o bin/$(BINARY) ./cmd/neoircd

-lint: ensure-web-dist
-	golangci-lint run --config .golangci.yml ./...
+test:
+	@script/test
+
+lint:
+	@script/lint

 fmt:
-	gofmt -s -w .
-	goimports -w .
+	@script/fmt

 fmt-check:
-	@test -z "$$(gofmt -l .)" || (echo "Files not formatted:" && gofmt -l . && exit 1)
+	@script/fmt-check

-test: ensure-web-dist
-	go test -timeout 120s -race -cover ./...
-
-# check runs all validation without making changes
-# Used by CI and Docker build — fails if anything is wrong
-check: test lint fmt-check
-	@echo "==> Building..."
-	go build -ldflags "$(LDFLAGS)" -o /dev/null ./cmd/neoircd
-	@echo "==> All checks passed!"
+check:
+	@script/check

 run: build
 	./bin/$(BINARY)
@@ -50,10 +55,7 @@ clean:
 	rm -rf bin/ neoircd

 docker:
-	docker build -t neoirc .
+	@script/docker

 hooks:
-	@printf '#!/bin/sh\nset -e\n' > .git/hooks/pre-commit
-	@printf 'go mod tidy\ngo fmt ./...\ngit diff --exit-code -- go.mod go.sum || { echo "go mod tidy changed files; please stage and retry"; exit 1; }\n' >> .git/hooks/pre-commit
-	@printf 'make check\n' >> .git/hooks/pre-commit
-	@chmod +x .git/hooks/pre-commit
+	@script/install-precommit
@@ -1,6 +1,6 @@
 ---
 title: Repository Policies
-last_modified: 2026-03-09
+last_modified: 2026-10-04
 ---

 This document covers repository structure, tooling, and workflow standards. Code
@@ -34,10 +34,57 @@ style conventions are in separate documents:
  every file before committing. There are zero exceptions to this rule.

 - Every repo with software must have a root `Makefile` with these targets:
-  `make test`, `make lint`, `make fmt` (writes), `make fmt-check` (read-only),
-  `make check` (prereqs: `test`, `lint`, `fmt-check`), `make docker`, and
-  `make hooks` (installs pre-commit hook). A model Makefile is at
-  `https://git.eeqj.de/sneak/prompts/raw/branch/main/Makefile`.
+  `make bootstrap`, `make setup`, `make test`, `make lint`, `make fmt` (writes),
+  `make fmt-check` (read-only), `make check` (runs `test`, `lint`, `fmt-check`),
+  `make docker`, and `make hooks` (installs pre-commit hook). A model Makefile
+  is at `https://git.eeqj.de/sneak/prompts/raw/branch/main/Makefile`.
+
+- Repos follow the
+  [Scripts to Rule Them All](https://github.com/github/scripts-to-rule-them-all)
+  pattern: the implementation of each Makefile target lives in an executable
+  script in `script/` (`script/bootstrap`, `script/setup`, `script/test`,
+  `script/lint`, `script/fmt`, `script/fmt-check`, `script/check`,
+  `script/docker`), and the Makefile targets are thin shims that call them. The
+  scripts must be POSIX sh (`#!/bin/sh`, `set -eu`, no bashisms) so they run in
+  minimal containers (e.g. alpine images have no bash); locate the repo root
+  with `$(cd "$(dirname "$0")/.." && pwd -P)` and `cd` there before acting. From
+  the standard's canonical set we use `bootstrap`, `setup` (make the repo ready
+  for development after a fresh clone: runs `bootstrap`, then
+  `install-precommit`, plus any repo-specific initialization), `test`, and
+  `cibuild`. `script/bootstrap` installs all dependencies idempotently and
+  assumes nothing is present: base tools come from nix, apt, brew, or apk
+  (detected in that order; apt runs noninteractive). For node it uses the
+  installed node if present; otherwise it installs a PINNED node version via
+  nvm, first installing nvm itself if missing — from a hash-verified GitHub
+  release archive (never `curl | sh`), with bash installed as an explicit
+  prerequisite since nvm requires bash. yarn is then pinned via
+  `corepack prepare yarn@<version> --activate`. Never install "latest" or "lts";
+  always exact versions. `script/cibuild` runs the CI build: it changes to the
+  repo root, runs `script/bootstrap`, runs `script/check`, and builds the image
+  with the version; the Gitea workflow calls it. **`script/cibuild` runs
+  `script/bootstrap` first**, because the workflow checks out the repo and runs
+  nothing else, while `script/fmt-check` runs the formatter on the host: on a
+  pristine checkout with nothing installed the run dies there, after the
+  containerised gates have passed. **The bootstrap alone is not enough**:
+  `script/bootstrap` installs node and yarn under nvm and leaves neither on the
+  `PATH` of the shell that called it, so a bare `yarn` still exits 127. The host
+  entrypoints that need yarn — `script/fmt` and `script/fmt-check` — therefore
+  source nvm for the pinned node version before invoking it, exactly as
+  `script/bootstrap`'s own install step does. A runner carrying nothing but
+  docker and git then gets through `script/check`. Four further scripts are our
+  own extensions to the standard: `script/check` runs `script/test`,
+  `script/lint` and `script/fmt-check`; `script/precommit` is what the git
+  pre-commit hook runs, and it calls `script/check`; `script/install-precommit`
+  installs the git pre-commit hook (the `make hooks` target shims to it); and
+  `script/projectname` (literally that filename) simply outputs the project's
+  name. Scripts that need the name call `script/projectname` — e.g.
+  `script/docker` assembles its image tag from it — so those scripts stay
+  byte-identical across all repos. Repo-type-specific pre-commit extras (e.g.
+  `go mod tidy` verification in Go repos) belong in `script/precommit`, not in
+  the hook itself. Model scripts are at
+  `https://git.eeqj.de/sneak/prompts/raw/branch/main/script/<name>`. The README
+  must document the provided scripts in an **Entrypoints** section (see the
+  README requirements below).

 - Always use Makefile targets (`make fmt`, `make test`, `make lint`, etc.)
  instead of invoking the underlying tools directly. The Makefile is the single
@@ -53,15 +100,198 @@ style conventions are in separate documents:
  contributor should be able to understand the entire development workflow by
  reading the Makefile.

- Every repo should have a `Dockerfile`. All Dockerfiles must run `make check`
-  as a build step so the build fails if the branch is not green. For non-server
-  repos, the Dockerfile should bring up a development environment and run
-  `make check`. For server repos, `make check` should run as an early build
-  stage before the final image is assembled.
+- Every repo should have a `Dockerfile`, and it carries the repo's gates: a
+  `lint` phase and a `test` phase, with the final stage depending on both so the
+  image cannot be built unless they pass. For non-server repos the final stage
+  brings up a development environment; for server repos it is the runtime image.
+  The gate phases and the build stage start from their pinned base images and
+  install what those images lack either inline, as the canonical Go `Dockerfile`
+  below does for `git`, or by running `script/bootstrap`, as the `prompts`
+  repo's own `Dockerfile` does for its yarn packages. The development
+  environment stage installs development prerequisites by running
+  `script/bootstrap` rather than duplicating its installs inline. A stage that
+  runs `script/bootstrap` COPYs `script/` and the dependency manifests
+  (`package.json` + `yarn.lock`, `go.mod` + `go.sum`, etc.) before running it.
+
+- **Linting and testing run in Docker, as phases of the `Dockerfile`.** There is
+  no separate lint file. `script/lint` and `script/test` each build one phase
+  and nothing else:
+
+    ```sh
+    docker build --no-cache --target lint -t "$(script/projectname)-lint" .
+    docker build --no-cache --target test -t "$(script/projectname)-test" .
+    ```
+
+    **A stage that is not the last one in the file is built only when the final
+    stage's chain depends on it, or when `--target` names it.** That is why the
+    two gates are always invoked by name here, and why the final stage carries a
+    `COPY --from=` of a harmless file from each of them: without that edge a
+    plain `docker build .` builds the last stage alone and exits 0 having linted
+    and tested nothing.
+
+    **Every `docker build` in `script/` is tagged**, here and in
+    `script/cibuild` and `script/docker`. An untagged build leaves a dangling
+    image behind on every invocation, on every developer host and every CI
+    runner; a tagged one replaces the previous image.
+
+    Inside a phase the tool is invoked directly — `golangci-lint`, `go test`,
+    `eslint`, `prettier` — never through `make lint` or `script/test`, which are
+    themselves a `docker build` and would recurse into a daemon that does not
+    exist in a build step. Formatting is the exception and stays on the host:
+    `script/fmt` writes the working tree, and `script/fmt-check` is its
+    read-only twin.
+
+    **No lint verdict may come from a host invocation of the linter.** On a
+    shared host golangci-lint reads a result cache keyed on file content rather
+    than location, so a second checkout of the same content is served the first
+    one's findings, and a host-global lock in `$TMPDIR` makes concurrent runs
+    exit non-zero with `parallel golangci-lint is running` — a status a caller
+    cannot tell from real findings. Both have produced wrong verdicts in this
+    org, in both directions. A container has its own cache, its own `TMPDIR` and
+    a digest-pinned binary, so neither is reachable.
+
+- **Any build that runs checks is built with `--no-cache`.** Docker invalidates
+  a `COPY` layer only when the copied content changes, so on an unchanged tree
+  the check `RUN` is served from cache, nothing executes, and the build still
+  exits 0. Every `docker build` in `script/` therefore passes `--no-cache`:
+  `script/lint`, `script/test`, `script/cibuild` and `script/docker` are the
+  four, and there is no fifth — `script/check` runs the two gate phases and
+  `script/fmt-check`, and builds no image of its own. A bare `docker build .` is
+  not evidence that anything ran: a sub-second build reporting success is a
+  cache hit, not a result. Never invalidate by pruning — `docker builder prune`
+  and friends destroy a build cache shared with every other build on the host.
+  When a check is added or changed, prove it works by planting a defect it must
+  catch and watching the run fail on it, then revert the defect. A green run
+  alone shows neither that the check ran nor that it covers what it should.
+
+- **The gate phases are separate stages, and the build stage depends on both.**
+  The lint phase is based on the `golangci/golangci-lint` image (pinned by
+  hash), so lint failures surface in seconds rather than after a full compile,
+  and the test phase is based on the Debian Go image. The canonical Go repo
+  `Dockerfile`:
+
+    ```dockerfile
+    # Lint phase
+    # golangci/golangci-lint:v2.x.x, YYYY-MM-DD
+    FROM golangci/golangci-lint@sha256:... AS lint
+    WORKDIR /src
+    COPY go.mod go.sum ./
+    RUN go mod download
+    COPY . .
+    RUN golangci-lint run --config .golangci.yml ./...
+
+    # Test phase. -race needs cgo and so a C compiler, which the Debian Go
+    # image ships and the alpine one does not.
+    # golang:1.x, YYYY-MM-DD
+    FROM golang@sha256:... AS test
+    WORKDIR /src
+    COPY go.mod go.sum ./
+    RUN go mod download
+    COPY . .
+    RUN go test -timeout 90s -race -cover ./... || \
+        { echo "--- Rerunning with -v for details ---"; \
+          go test -timeout 90s -race -v ./...; exit 1; }
+
+    # Build stage. Nothing is wanted from either phase above; the copies
+    # are what make BuildKit build them first, so this stage cannot run
+    # unless lint and test passed.
+    # golang:1.x-alpine, YYYY-MM-DD
+    FROM golang@sha256:... AS builder
+    COPY --from=lint /src/go.sum /dev/null
+    COPY --from=test /src/go.sum /dev/null
+    RUN apk add --no-cache git
+    # A tar-stream context keeps the sender's file owners, which git refuses.
+    RUN git config --system --add safe.directory /src
+    WORKDIR /src
+    COPY go.mod go.sum ./
+    RUN go mod download
+    COPY . .
+
+    # The VERSION build arg when one is given, otherwise
+    # `git describe --tags --always` on the .git in the build context. With
+    # .git present, a version that is still empty, dev or unknown fails the
+    # build: git is missing or could not read the checkout.
+    ARG VERSION
+    RUN VERSION="${VERSION:-$(git describe --tags --always)}"; \
+        if [ -e .git ]; then \
+            case "$VERSION" in ""|dev|unknown) \
+                echo "version is '$VERSION' although .git is present" >&2; \
+                exit 1 ;; \
+            esac; \
+        fi; \
+        CGO_ENABLED=0 go build -trimpath \
+            -ldflags="-s -w -X main.Version=${VERSION}" \
+            -o /app ./cmd/app/
+
+    # Runtime stage, and the last one
+    FROM alpine@sha256:...
+    COPY --from=builder /app /usr/local/bin/app
+    ENTRYPOINT ["app"]
+    ```
+
+    Key points:
+    - The lint phase uses the `golangci/golangci-lint` image directly (it has
+      both Go and the linter), so nothing needs installing.
+    - `COPY --from=<phase> /src/go.sum /dev/null` is a no-op copy whose only
+      purpose is the ordering edge. BuildKit runs stages in parallel by default,
+      and a stage nothing depends on is not built at all, so without these two
+      lines a red gate would not fail the build.
+    - Keep the runtime stage last, and if you add a stage after it, give it the
+      same two copies. A plain `docker build .` builds the last stage's chain
+      and nothing else.
+    - If the project uses `//go:embed` directives that reference build artifacts
+      (e.g. a web frontend compiled in a separate stage), the lint phase must
+      create placeholder files so the embed directives resolve. Example:
+      `RUN mkdir -p web/dist && touch web/dist/index.html web/dist/style.css`.
+    - If the project requires CGO or system libraries for linting, install them
+      in the lint phase. The `golangci/golangci-lint` image is Debian-based and
+      has no `apk`, so install with `apt-get` under the Debian package name
+      (`libvips-dev`, where alpine says `vips-dev`), and delete the package
+      lists in the same `RUN`, so the layer does not keep them:
+
+        ```dockerfile
+        RUN apt-get update \
+            && apt-get install -y --no-install-recommends libvips-dev \
+            && rm -rf /var/lib/apt/lists/*
+        ```
+
+    - `.dockerignore` lets `.git` into the build context. It keeps out every git
+      `config` at any depth (`**/.git/config`, `**/.git/modules/**/config`): the
+      repository's own, each submodule's under `.git/modules/`, and that of a
+      submodule keeping its own `.git` directory. `git describe` does not need
+      them, and each can hold a credential: a password in a remote URL, or the
+      token the CI checkout step stores there. A submodule whose name has a
+      `config` segment (`config`, `deploy/config`, `config/lib`) loses its whole
+      git directory to `**/.git/modules/**/config`, and Go's version stamping
+      then fails the build: give it a name without that segment
+      (`git submodule add --name`). The stage that compiles has `git` (the
+      Debian Go image has it; an alpine one needs `apk add --no-cache git`) and
+      takes the version from the `VERSION` build argument when one is given,
+      otherwise from `git describe --tags --always`. That gives the tag on a
+      tagged commit; on a later commit, the tag, the number of commits since it
+      and the short commit (`v1.2.3-4-gabc1234`); and the short commit when no
+      tag is reachable. The stage that compiles also marks its working directory
+      safe for git (`git config --system --add safe.directory /src`): a context
+      sent as a tar stream keeps the sender's file owners, and git refuses a
+      checkout owned by another user, so the version would come out empty.
+      `ARG VERSION` has no default, and the build fails if the context carries
+      `.git` and the version still comes out empty, `dev` or `unknown`. A plain
+      `docker build .` with no build arguments must succeed; a Dockerfile that
+      refuses an empty build argument drops that refusal and keeps the argument.

 - Every repo should have a Gitea Actions workflow (`.gitea/workflows/`) that
-  runs `docker build .` on push. Since the Dockerfile already runs `make check`,
-  a successful build implies all checks pass.
+  runs `script/cibuild` on push, and checks out the repo as its only other step.
+  That script bootstraps, runs the gate phases, and then builds the image, so a
+  successful run means every check passed; a bare `docker build .` does not
+  carry the same guarantee, because its gate phases may come from the cache. The
+  image build is uncached and so runs the gate phases a second time. That is the
+  price of the rule above, and it is worth paying: the image that ships is built
+  from a run of its own gates rather than from a cache entry. A separate
+  workflow limited to `main` by a `branches` list under `on: push` cannot be
+  checked by review: to try a change to it, add the feature branch to that list
+  and push, then remove the branch from the list again before merging. Keep any
+  job in it that publishes behind `if: github.ref_name == 'main'`, so the run
+  from the feature branch publishes nothing.

 - Use platform-standard formatters: `black` for Python, `prettier` for
  JS/CSS/Markdown/HTML, `go fmt` for Go. Always use default configuration with
@@ -69,9 +299,11 @@ style conventions are in separate documents:
  Markdown (hard-wrap at 80 columns). Documentation and writing repos (Markdown,
  HTML, CSS) should also have `.prettierrc` and `.prettierignore`.

- Pre-commit hook: `make check` if local testing is possible, otherwise
-  `make lint && make fmt-check`. The Makefile should provide a `make hooks`
-  target to install the pre-commit hook.
+- Pre-commit hook: runs `script/precommit`, which calls `script/check`. If local
+  testing is not possible in the repo, `script/precommit` may skip `script/test`
+  and run only `script/lint` and `script/fmt-check`. The hook is installed by
+  `script/install-precommit`; the Makefile must provide a `make hooks` target
+  that shims to it.

 - All repos with software must have tests that run via the platform-standard
  test framework (`go test`, `pytest`, `jest`/`vitest`, etc.). If no meaningful
@@ -79,8 +311,66 @@ style conventions are in separate documents:
  module under test to verify it compiles/parses. There is no excuse for
  `make test` to be a no-op.

- `make test` must complete in under 20 seconds. Add a 30-second timeout in the
-  Makefile.
+- `make test` must complete in under 60 seconds. That is the hard cap, and a
+  suite that exceeds it fails. Under 20 seconds is the target. A suite between
+  20 and 60 seconds is still green, but the overage must be filed as an
+  improvement bug against that repo. Add a 90-second timeout to the test
+  invocation (`go test -timeout 90s`). The backstop deliberately sits above the
+  hard cap so that it catches a genuinely hung test rather than a merely slow
+  one.
+
+- **The test command should use the conditional verbose rerun pattern.** Run
+  tests without `-v` (verbose) first. If tests fail, automatically rerun with
+  `-v` to show full output. This keeps CI logs and `docker build` output clean
+  on success (just package/suite summaries) while providing full diagnostic
+  detail on failure (every test case, every assertion). The command lives in the
+  `test` phase of the `Dockerfile`, since `script/test` builds that phase; the
+  Makefile form below is the same pattern for any repo-local invocation:
+
+    ```makefile
+    test:
+    	@<test-command> || \
+    		{ echo "--- Rerunning with -v for details ---"; \
+    		  <test-command-with-v>; exit 1; }
+    ```
+
+    Go example:
+
+    ```makefile
+    test:
+    	@go test -count=1 -timeout 90s -race -cover ./... || \
+    		{ echo "--- Rerunning with -v for details ---"; \
+    		  go test -count=1 -timeout 90s -race -v ./...; exit 1; }
+    ```
+
+    `-count=1` is required on both invocations: it defeats Go's test _result_
+    cache, so neither run can report a stored pass in place of running the
+    tests. It leaves the build cache alone, so it costs the runtime of the suite
+    and no recompilation.
+
+    That cache is Go's own, separate from Docker's layer cache. Go stores a
+    passing result in its cache directory (`GOCACHE`), and when the same tests
+    run again on unchanged code it prints that result, marked `(cached)`,
+    without running them. That matters on a developer's machine, where this
+    target runs and the directory lasts from one run to the next. The `test`
+    phase of the `Dockerfile` needs no `-count=1`: its base image holds no
+    result for this repo's tests and nothing before its `go test` step runs a
+    test, so there is nothing to replay. `--no-cache` (above) is what makes that
+    step run on an unchanged tree.
+
+    Python example:
+
+    ```makefile
+    test:
+    	@python -m pytest || \
+    		{ echo "--- Rerunning with -v for details ---"; \
+    		  python -m pytest -v; exit 1; }
+    ```
+
+    The `exit 1` ensures the target always fails after a rerun — the first run
+    already proved the tests are broken, so the build must not pass even if a
+    flaky test happens to succeed on the second attempt. The rerun exists solely
+    for diagnostic output.

 - Docker builds must complete in under 5 minutes.

@@ -93,10 +383,84 @@ style conventions are in separate documents:
  must be in `.gitignore`. No exceptions.

 - `.gitignore` should be comprehensive from the start: OS files (`.DS_Store`),
-  editor files (`.swp`, `*~`), language build artifacts, and `node_modules/`.
-  Fetch the standard `.gitignore` from
-  `https://git.eeqj.de/sneak/prompts/raw/branch/main/.gitignore` when setting up
-  a new repo.
+  editor files (`.swp`, `*~`), in-repo agent scratch directories (`.claude/`),
+  language build artifacts, and `node_modules/`. Fetch the standard `.gitignore`
+  from `https://git.eeqj.de/sneak/prompts/raw/branch/main/.gitignore` when
+  setting up a new repo. These patterns are written to `.gitignore`'s own
+  semantics, in which an unanchored pattern already matches at every depth; they
+  are not a `.dockerignore` and must not be transplanted into one unmodified.
+
+- **`.dockerignore` does not use `.gitignore` semantics, and copying patterns
+  across unmodified leaves secrets in the build context.** Docker matches with
+  `moby/patternmatcher`: `filepath.Match` semantics plus a `**` extension, so
+  `*` does not cross `/` and a pattern without a leading `**/` is anchored at
+  the build-context root. A `.dockerignore` listing `.env`, `*.pem` and `*.key`
+  therefore excludes only the copies at the repository root, while `config/.env`
+  and `certs/server.key` still reach the context and can land in an image layer
+  — which is more dangerous than a short file with no secret patterns at all,
+  because it reads as solved and stops anyone looking. Give every
+  depth-independent pattern the `**/` prefix and leave only genuinely
+  root-anchored entries unprefixed: `.claude`, and the repo's own host-built
+  binary, written `/myapp` and never `**/myapp`, which would also match
+  `cmd/myapp/` and delete the package directory from the context. Matching is
+  case-sensitive, and an ALL-CAPS twin per pattern still misses `Server.Key`, so
+  secret names use character ranges — `**/*.[kK][eE][yY]`, `**/*.[pP][eE][mM]`,
+  and likewise for `.envrc` and the extensionless SSH keys. Where such a pattern
+  also catches something the build needs, re-include it with a negation
+  (`!docs/example.env`); deleting the pattern reopens the exposure for every
+  other file it covers. Fetch the standard `.dockerignore` from
+  `https://git.eeqj.de/sneak/prompts/raw/branch/main/.dockerignore` and extend
+  it with the repo's own artifacts.
+
+- **In-repo agent scratch belongs in both files, written to each file's own
+  semantics.** `.claude/` holds one worktree per in-flight agent — an entire
+  additional checkout of the repo — so under `COPY . .` the build context
+  inflates by a multiple of the repo and another session's unreviewed work can
+  be copied into an image layer. In `.gitignore` the entry is `.claude/`,
+  unanchored. In `.dockerignore` it is `.claude`, anchored and with **no** `**/`
+  prefix, because the prefixed form would also delete any nested directory of
+  that name from the build. Anchoring carries a known gap that the canonical
+  `.dockerignore` states in its own comment, since consuming repos receive the
+  file and not the tracker: the directory is created in the agent's working
+  directory, so a repo running agents in subdirectories still ships
+  `services/api/.claude/` and must add its own anchored entry there.
+
+- **A plain `docker build .` of a clone stamps the version that
+  `git describe --tags --always` gives**, derived from the `.git` in the build
+  context as the canonical `Dockerfile` above shows. Without its failure check,
+  a missing `git` or an unreadable checkout would leave `-X main.Version=` empty
+  and the build would still exit 0. `script/docker` and `script/cibuild` pass
+  the version they compute on the host; it takes precedence. They do this
+  byte-identically across repos:
+
+    ```sh
+    # Own line: a failing command substitution inside an argument does not
+    # trip `set -e`, so the inline form degrades to an empty constant.
+    version="$(git describe --tags --always --dirty 2>/dev/null || true)"
+    [ -n "$version" ] || version="unknown"
+    docker build --no-cache \
+        --build-arg VERSION="$version" \
+        -t "$(script/projectname)" .
+    ```
+
+    `--always` makes an untagged repo yield an abbreviated commit hash rather
+    than failing, and the `[ -n "$version" ]` line is the single place the
+    fallback is applied — a live check that fires on a build from an export with
+    no `.git` and on a repository with no commits yet. Do not fold it into the
+    substitution as `|| echo unknown`, which makes the guard unreachable. The
+    Dockerfile's side is `ARG VERSION` in the stage that compiles, declared
+    there because `ARG` is stage-scoped; passing `VERSION` to a repo whose
+    Dockerfile declares no such `ARG` is ignored and costs nothing, which is why
+    the scripts stay byte-identical. One consequence for CI: the standard
+    checkout action clones shallow and fetches no tags, so a repo that embeds a
+    tag-derived version must set `fetch-depth: 0` on its checkout step.
+
+- **Verify `.dockerignore` by enumerating the image, not by reading the
+  patterns.** Plant files at the root _and_ at least two directories deep, build
+  a probe image that does `COPY . .`, and list what actually landed
+  (`docker run --rm --entrypoint find IMAGE /app`). The `transferring context`
+  size is not a substitute: a nested secret is a few bytes, and BuildKit
+  transfers only the delta from the previous build.

 - **No build artifacts in version control.** Code-derived data (compiled
  bundles, minified output, generated assets) must never be committed to the
@@ -112,9 +476,56 @@ style conventions are in separate documents:
 - Make all changes on a feature branch. You can do whatever you want on a
  feature branch.

- `.golangci.yml` is standardized and must _NEVER_ be modified by an agent, only
-  manually by the user. Fetch from
-  `https://git.eeqj.de/sneak/prompts/raw/branch/main/.golangci.yml`.
+- `.golangci.yml` is standardized. The vendored copy in a consuming repo must
+  _NEVER_ be modified by an agent: fetch it from
+  `https://git.eeqj.de/sneak/prompts/raw/branch/main/.golangci.yml` and keep it
+  byte-identical, so that no repo can quietly loosen its own linting. Linter
+  configuration changes are made to the canonical copy in the `prompts` repo and
+  reach consuming repos by re-vendoring; an agent may open a PR against
+  canonical, which only the user merges. One list is exempt from byte-identity,
+  because it cannot be written once for every repo: the `deny` list of the
+  `test-support` depguard rule, where a repo names its own test-support packages
+  by full import path. A repo adds entries there and changes nothing else, and a
+  re-vendor carries its entries forward. The canonical golangci-lint version is
+  v2.14.0 (released 2026-09-24), pinned as the digest of the lint phase's base
+  image
+  (`golangci/golangci-lint@sha256:ad862ba6b3798cbe0fd9fd7408d498fd74fbd2623a92406b2fd3898faf0bf98f`,
+  which reports `2.14.0 built with go1.27.0 from 114493f9`). A module's `go`
+  directive must not name a newer Go minor version than the one golangci-lint
+  was built with, or golangci-lint refuses to lint it: this release lints
+  `go 1.27.1` but not `go 1.28`. That digest is the only pin, since no repo
+  installs golangci-lint on the host. A repo sets the lint phase digest to the
+  one named here and re-vendors `.golangci.yml` in the same commit, whichever of
+  the two prompted the change: the canonical copy can name linters that an older
+  golangci-lint rejects, and a newer golangci-lint can add linters that
+  `default: all` switches on until the canonical copy disables them.
+
+- **`script/bootstrap` installs a pinned tool by comparing versions, never by
+  testing presence.** An `if ! command -v <tool>; then install; fi` guard tests
+  `PATH` only, so on an already-provisioned machine the pin is inert and a
+  version bump is a silent no-op — while the Dockerfile, installing into a clean
+  image, gets the pinned version, so a local `make check` and `make docker` can
+  disagree about what the tool even is. The canonical form:
+    - compares the installed version against the pin over the **whole** version
+      token; a parser that stops at the first `-` reports `2.12.2` for a host
+      running `2.12.2-rc1` and skips the install;
+    - treats absent, non-zero, empty or unrecognised `--version` output as a
+      mismatch, so the failure direction is a redundant install and never a
+      skipped one;
+    - after installing, re-resolves the binary the way callers do — `hash -r`,
+      then through `PATH`, not through the directory the installer wrote to —
+      and fails naming the resolved path, since an install that a shadowing
+      binary hides succeeds while changing nothing any caller sees;
+    - is actually called, and prints the version on both success paths: a
+      function defined and never invoked has the same exit status and the same
+      empty output as one that worked.
+
+    Keep it POSIX sh: no arrays, no `[[`, no `grep -P`.
+
+    A Go tool a repo needs on the host is installed with `go install` pinned to
+    a commit hash (`go install <package>@<commit hash>`). It is never tracked as
+    a `go.mod` tool dependency or through a `tools.go` file, either of which
+    pulls the tool's own dependencies into the repo's `go.mod` and `go.sum`.

 - When pinning images or packages by hash, add a comment above the reference
  with the version and date (YYYY-MM-DD).
@@ -128,12 +539,76 @@ style conventions are in separate documents:
 - Dockerized web services listen on port 8080 by default, overridable with
  `PORT`.

+- **HTTP/web services must be hardened for production internet exposure before
+  tagging 1.0.** This means full compliance with security best practices
+  including, without limitation, all of the following:
+    - **Security headers** on every response:
+        - `Strict-Transport-Security` (HSTS) with `max-age` of at least one year
+          and `includeSubDomains`.
+        - `Content-Security-Policy` (CSP) with a restrictive default policy
+          (`default-src 'self'` as a baseline, tightened per-resource as
+          needed). Never use `unsafe-inline` or `unsafe-eval` unless
+          unavoidable, and document the reason.
+        - `X-Frame-Options: DENY` (or `SAMEORIGIN` if framing is required).
+          Prefer the `frame-ancestors` CSP directive as the primary control.
+        - `X-Content-Type-Options: nosniff`.
+        - `Referrer-Policy: strict-origin-when-cross-origin` (or stricter).
+        - `Permissions-Policy` restricting access to browser features the
+          application does not use (camera, microphone, geolocation, etc.).
+    - **Request and response limits:**
+        - Maximum request body size enforced on all endpoints (e.g. Go
+          `http.MaxBytesReader`). Choose a sane default per-route; never accept
+          unbounded input.
+        - Maximum response body size where applicable (e.g. paginated APIs).
+        - `ReadTimeout` and `ReadHeaderTimeout` on the `http.Server` to defend
+          against slowloris attacks.
+        - `WriteTimeout` on the `http.Server`.
+        - `IdleTimeout` on the `http.Server`.
+        - Per-handler execution time limits via `context.WithTimeout` or
+          chi/stdlib `middleware.Timeout`.
+    - **Authentication and session security:**
+        - Rate limiting on password-based authentication endpoints. API keys are
+          high-entropy and not susceptible to brute force, so they are exempt.
+        - CSRF tokens on all state-mutating HTML forms. API endpoints
+          authenticated via `Authorization` header (Bearer token, API key) are
+          exempt because the browser does not attach these automatically.
+        - Passwords stored using bcrypt, scrypt, or argon2 — never plain-text,
+          MD5, or SHA.
+        - Session cookies set with `HttpOnly`, `Secure`, and `SameSite=Lax` (or
+          `Strict`) attributes.
+    - **Reverse proxy awareness:**
+        - True client IP detection when behind a reverse proxy
+          (`X-Forwarded-For`, `X-Real-IP`). The application must accept
+          forwarded headers only from a configured set of trusted proxy
+          addresses — never trust `X-Forwarded-For` unconditionally.
+    - **CORS:**
+        - Authenticated endpoints must restrict `Access-Control-Allow-Origin` to
+          an explicit allowlist of known origins. Wildcard (`*`) is acceptable
+          only for public, unauthenticated read-only APIs.
+    - **Error handling:**
+        - Internal errors must never leak stack traces, SQL queries, file paths,
+          or other implementation details to the client. Return generic error
+          messages in production; detailed errors only when `DEBUG` is enabled.
+    - **TLS:**
+        - Services never terminate TLS directly. They are always deployed behind
+          a TLS-terminating reverse proxy. The service itself listens on plain
+          HTTP. However, HSTS headers and `Secure` cookie flags must still be
+          set by the application so that the browser enforces HTTPS end-to-end.
+
+    This list is non-exhaustive. Apply defense-in-depth: if a standard security
+    hardening measure exists for HTTP services and is not listed here, it is
+    still expected. When in doubt, harden.
+
 - `README.md` is the primary documentation. Required sections:
    - **Description**: First line must include the project name, purpose,
      category (web server, SPA, CLI tool, etc.), license, and author. Example:
      "µPaaS is an MIT-licensed Go web application by @sneak that receives
      git-frontend webhooks and deploys applications via Docker in realtime."
    - **Getting Started**: Copy-pasteable install/usage code block.
+    - **Entrypoints**: Opens by stating that the repo adheres to the
+      [Scripts to Rule Them All](https://github.com/github/scripts-to-rule-them-all)
+      standard (with that link), then documents each provided `script/`
+      entrypoint and its purpose.
    - **Rationale**: Why does this exist?
    - **Design**: How is the program structured?
    - **TODO**: Update meticulously, even between commits. When planning, put
@@ -164,12 +639,14 @@ style conventions are in separate documents:
  settings.

 - Avoid putting files in the repo root unless necessary. Root should contain
-  only project-level config files (`README.md`, `Makefile`, `Dockerfile`,
-  `LICENSE`, `.gitignore`, `.editorconfig`, `REPO_POLICIES.md`, and
-  language-specific config). Everything else goes in a subdirectory. Canonical
-  subdirectory names:
+  only project-level config files (`README.md`, `AGENTS.md`, `Makefile`,
+  `Dockerfile`, `LICENSE`, `.gitignore`, `.editorconfig`, `REPO_POLICIES.md`,
+  and language-specific config). Everything else goes in a subdirectory.
+  Canonical subdirectory names:
    - `bin/` — executable scripts and tools
-    - `cmd/` — Go command entrypoints
+    - `cmd/` — Go command entrypoints; thin only: one `main.go` per binary whose
+      body is a single call into `internal/` or `pkg/`, no project logic in
+      `cmd/`
    - `configs/` — configuration templates and examples
    - `deploy/` — deployment manifests (k8s, compose, terraform)
    - `docs/` — documentation and markdown (README.md stays in root)
@@ -188,8 +665,15 @@ style conventions are in separate documents:
    - `README.md`, `.git`, `.gitignore`, `.editorconfig`
    - `LICENSE`, `REPO_POLICIES.md` (copy from the `prompts` repo)
    - `Makefile`
+    - `script/` entrypoints (`bootstrap`, `setup`, `projectname`, `test`,
+      `lint`, `fmt`, `fmt-check`, `check`, `docker`, `cibuild`, `precommit`,
+      `install-precommit`)
    - `Dockerfile`, `.dockerignore`
    - `.gitea/workflows/check.yml`
    - Go: `go.mod`, `go.sum`, `.golangci.yml`
    - JS: `package.json`, `yarn.lock`, `.prettierrc`, `.prettierignore`
    - Python: `pyproject.toml`
+
+- Guidance for coding agents lives in one `AGENTS.md` at the repository root. It
+  is never committed under a file or directory named after one agent tool, such
+  as `CLAUDE.md` or `.claude/`, and never split into separate memory files.
@@ -1,4 +1,3 @@
-// Package db provides database access and migration management.
 package db

 import (
@@ -1150,7 +1150,8 @@ func scanMessages(
 			code, _ := strconv.Atoi(msg.Command)
 			msg.Code = code

-			if mt, err := irc.FromInt(code); err == nil {
+			mt, lookupErr := irc.FromInt(code)
+			if lookupErr == nil {
 				msg.Command = mt.Name()
 			}
 		}
@@ -1373,7 +1374,9 @@ func (database *Database) GetStaleOrphanSessions(

 	for rows.Next() {
 		var stale StaleSession
-		if err := rows.Scan(&stale.ID, &stale.Nick); err != nil {
+
+		err = rows.Scan(&stale.ID, &stale.Nick)
+		if err != nil {
 			return nil, fmt.Errorf(
 				"scan stale session: %w", err,
 			)
@@ -1382,7 +1385,8 @@ func (database *Database) GetStaleOrphanSessions(
 		result = append(result, stale)
 	}

-	if err := rows.Err(); err != nil {
+	err = rows.Err()
+	if err != nil {
 		return nil, fmt.Errorf(
 			"iterate stale sessions: %w", err,
 		)
@@ -1905,9 +1909,10 @@ func (database *Database) ListChannelBans(
 	for rows.Next() {
 		var ban BanInfo

-		if scanErr := rows.Scan(
+		scanErr := rows.Scan(
 			&ban.Mask, &ban.SetBy, &ban.CreatedAt,
-		); scanErr != nil {
+		)
+		if scanErr != nil {
 			return nil, fmt.Errorf(
 				"scan channel ban: %w", scanErr,
 			)
@@ -1916,7 +1921,8 @@ func (database *Database) ListChannelBans(
 		bans = append(bans, ban)
 	}

-	if rowErr := rows.Err(); rowErr != nil {
+	rowErr := rows.Err()
+	if rowErr != nil {
 		return nil, fmt.Errorf(
 			"iterate channel bans: %w", rowErr,
 		)
@@ -2247,11 +2253,12 @@ func (database *Database) ListAllChannelsWithCountsFiltered(
 	for rows.Next() {
 		var chanInfo ChannelInfoFull

-		if scanErr := rows.Scan(
+		scanErr := rows.Scan(
 			&chanInfo.Name,
 			&chanInfo.MemberCount,
 			&chanInfo.Topic,
-		); scanErr != nil {
+		)
+		if scanErr != nil {
 			return nil, fmt.Errorf(
 				"scan channel: %w", scanErr,
 			)
@@ -2260,7 +2267,8 @@ func (database *Database) ListAllChannelsWithCountsFiltered(
 		channels = append(channels, chanInfo)
 	}

-	if rowErr := rows.Err(); rowErr != nil {
+	rowErr := rows.Err()
+	if rowErr != nil {
 		return nil, fmt.Errorf(
 			"iterate channels: %w", rowErr,
 		)
@@ -2308,11 +2316,12 @@ func (database *Database) GetSessionChannelsFiltered(
 	for rows.Next() {
 		var chanInfo ChannelInfo

-		if scanErr := rows.Scan(
+		scanErr := rows.Scan(
 			&chanInfo.ID,
 			&chanInfo.Name,
 			&chanInfo.Topic,
-		); scanErr != nil {
+		)
+		if scanErr != nil {
 			return nil, fmt.Errorf(
 				"scan channel: %w", scanErr,
 			)
@@ -2321,7 +2330,8 @@ func (database *Database) GetSessionChannelsFiltered(
 		channels = append(channels, chanInfo)
 	}

-	if rowErr := rows.Err(); rowErr != nil {
+	rowErr := rows.Err()
+	if rowErr != nil {
 		return nil, fmt.Errorf(
 			"iterate channels: %w", rowErr,
 		)
@@ -987,11 +987,12 @@ func TestGetOperCount(t *testing.T) {
 	sid2, _, _, err := database.CreateSession(
 		ctx, "user2", "", "", "",
 	)
-	_ = sid2
 	if err != nil {
 		t.Fatal(err)
 	}

+	_ = sid2
+
 	// Initially zero opers.
 	count, err := database.GetOperCount(ctx)
 	if err != nil {
@@ -1023,23 +1024,25 @@ func TestGetOperCount(t *testing.T) {
 func TestWildcardMatch(t *testing.T) {
 	t.Parallel()

+	const hostmask = "nick!user@host"
+
 	tests := []struct {
 		pattern string
 		input   string
 		match   bool
 	}{
-		{"*!*@*", "nick!user@host", true},
+		{"*!*@*", hostmask, true},
 		{"*!*@*.example.com", "nick!user@foo.example.com", true},
 		{"*!*@*.example.com", "nick!user@other.net", false},
 		{"badnick!*@*", "badnick!user@host", true},
 		{"badnick!*@*", "goodnick!user@host", false},
-		{"nick!user@host", "nick!user@host", true},
-		{"nick!user@host", "nick!user@other", false},
+		{hostmask, hostmask, true},
+		{hostmask, "nick!user@other", false},
 		{"*", "anything", true},
-		{"?ick!*@*", "nick!user@host", true},
+		{"?ick!*@*", hostmask, true},
 		{"?ick!*@*", "nn!user@host", false},
 		// Case-insensitive.
-		{"Nick!*@*", "nick!user@host", true},
+		{"Nick!*@*", hostmask, true},
 	}

 	for _, tc := range tests {
@@ -125,21 +125,18 @@ func (hdlr *Handlers) authSession(
 }

 // setAuthCookie sets the authentication cookie on the
-// response.
+// response. It is always Secure: the server runs behind a
+// TLS-terminating reverse proxy.
 func (hdlr *Handlers) setAuthCookie(
 	writer http.ResponseWriter,
-	request *http.Request,
 	token string,
 ) {
-	secure := request.TLS != nil ||
-		request.Header.Get("X-Forwarded-Proto") == "https"
-
 	http.SetCookie(writer, &http.Cookie{ //nolint:exhaustruct // optional fields
 		Name:     authCookieName,
 		Value:    token,
 		Path:     "/",
 		HttpOnly: true,
-		Secure:   secure,
+		Secure:   true,
 		SameSite: http.SameSiteStrictMode,
 	})
 }
@@ -148,17 +145,13 @@ func (hdlr *Handlers) setAuthCookie(
 // the client.
 func (hdlr *Handlers) clearAuthCookie(
 	writer http.ResponseWriter,
-	request *http.Request,
 ) {
-	secure := request.TLS != nil ||
-		request.Header.Get("X-Forwarded-Proto") == "https"
-
 	http.SetCookie(writer, &http.Cookie{ //nolint:exhaustruct // optional fields
 		Name:     authCookieName,
 		Value:    "",
 		Path:     "/",
 		HttpOnly: true,
-		Secure:   secure,
+		Secure:   true,
 		SameSite: http.SameSiteStrictMode,
 		MaxAge:   -1,
 	})
@@ -172,7 +165,7 @@ func (hdlr *Handlers) requireAuth(
 		hdlr.authSession(request)
 	if err != nil {
 		hdlr.respondJSON(writer, request, map[string]any{
-			"error":   "not registered",
+			errorKey:  "not registered",
 			"numeric": irc.ErrNotRegistered,
 		}, http.StatusUnauthorized)

@@ -285,11 +278,11 @@ func (hdlr *Handlers) executeCreateSession(

 	hdlr.deliverMOTD(request, clientID, sessionID, nick)

-	hdlr.setAuthCookie(writer, request, token)
+	hdlr.setAuthCookie(writer, token)

 	hdlr.respondJSON(writer, request, map[string]any{
-		"id":   sessionID,
-		"nick": nick,
+		"id":    sessionID,
+		nickKey: nick,
 	}, http.StatusCreated)
 }

@@ -643,7 +636,7 @@ func (hdlr *Handlers) HandleState() http.HandlerFunc {

 		hdlr.respondJSON(writer, request, map[string]any{
 			"id":       sessionID,
-			"nick":     nick,
+			nickKey:    nick,
 			"channels": channels,
 		}, http.StatusOK)
 	}
@@ -1090,7 +1083,7 @@ func (hdlr *Handlers) dispatchQueryCommand(
 		)
 		hdlr.broker.Notify(sessionID)
 		hdlr.respondJSON(writer, request,
-			map[string]string{"status": "error"},
+			map[string]string{statusKey: statusError},
 			http.StatusOK)
 	}
 }
@@ -1112,7 +1105,7 @@ func (hdlr *Handlers) handlePrivmsg(
 		)
 		hdlr.broker.Notify(sessionID)
 		hdlr.respondJSON(writer, request,
-			map[string]string{"status": "error"},
+			map[string]string{statusKey: statusError},
 			http.StatusOK)

 		return
@@ -1127,7 +1120,7 @@ func (hdlr *Handlers) handlePrivmsg(
 		)
 		hdlr.broker.Notify(sessionID)
 		hdlr.respondJSON(writer, request,
-			map[string]string{"status": "error"},
+			map[string]string{statusKey: statusError},
 			http.StatusOK)

 		return
@@ -1169,7 +1162,7 @@ func (hdlr *Handlers) respondIRCError(
 	)
 	hdlr.broker.Notify(sessionID)
 	hdlr.respondJSON(writer, request,
-		map[string]string{"status": "error"},
+		map[string]string{statusKey: statusError},
 		http.StatusOK)
 }

@@ -1257,7 +1250,7 @@ func (hdlr *Handlers) handleChannelMsg(
 	hdlr.broker.Notify(sessionID)

 	hdlr.respondJSON(writer, request,
-		map[string]string{"id": uuid, "status": "sent"},
+		map[string]string{"id": uuid, statusKey: "sent"},
 		http.StatusOK)
 }

@@ -1447,7 +1440,7 @@ func (hdlr *Handlers) handleDirectMsg(

 	hdlr.respondJSON(writer, request,
 		map[string]string{
-			"id": result.UUID, "status": "sent",
+			"id": result.UUID, statusKey: "sent",
 		},
 		http.StatusOK)
 }
@@ -1522,7 +1515,7 @@ func (hdlr *Handlers) executeJoin(

 	hdlr.respondJSON(writer, request,
 		map[string]string{
-			"status":  "joined",
+			statusKey: "joined",
 			"channel": channel,
 		},
 		http.StatusOK)
@@ -1679,6 +1672,7 @@ func (hdlr *Handlers) handlePart(

 	// Extract reason from body for the service call.
 	reason := ""
+
 	if body != nil {
 		var lines []string
 		if json.Unmarshal(body, &lines) == nil &&
@@ -1700,7 +1694,7 @@ func (hdlr *Handlers) handlePart(

 	hdlr.respondJSON(writer, request,
 		map[string]string{
-			"status":  "parted",
+			statusKey: "parted",
 			"channel": channel,
 		},
 		http.StatusOK)
@@ -1739,7 +1733,7 @@ func (hdlr *Handlers) handleNick(
 	if newNick == nick {
 		hdlr.respondJSON(writer, request,
 			map[string]string{
-				"status": "ok", "nick": newNick,
+				statusKey: "ok", nickKey: newNick,
 			},
 			http.StatusOK)

@@ -1770,7 +1764,7 @@ func (hdlr *Handlers) executeNickChange(

 	hdlr.respondJSON(writer, request,
 		map[string]string{
-			"status": "ok", "nick": newNick,
+			statusKey: "ok", nickKey: newNick,
 		},
 		http.StatusOK)
 }
@@ -1831,7 +1825,7 @@ func (hdlr *Handlers) handleTopic(

 	hdlr.respondJSON(writer, request,
 		map[string]string{
-			"status": "ok", "topic": topic,
+			statusKey: "ok", "topic": topic,
 		},
 		http.StatusOK)
 }
@@ -1885,7 +1879,7 @@ func (hdlr *Handlers) dispatchInfoCommand(
 	_ = target
 	_ = bodyLines

-	okResp := map[string]string{"status": "ok"}
+	okResp := map[string]string{statusKey: "ok"}

 	switch command {
 	case irc.CmdMotd:
@@ -1916,6 +1910,7 @@ func (hdlr *Handlers) handleQuit(
 	body json.RawMessage,
 ) {
 	reason := "Client quit"
+
 	if body != nil {
 		var lines []string
 		if json.Unmarshal(body, &lines) == nil &&
@@ -1928,10 +1923,10 @@ func (hdlr *Handlers) handleQuit(
 		request.Context(), sessionID, nick, reason,
 	)

-	hdlr.clearAuthCookie(writer, request)
+	hdlr.clearAuthCookie(writer)

 	hdlr.respondJSON(writer, request,
-		map[string]string{"status": "quit"},
+		map[string]string{statusKey: "quit"},
 		http.StatusOK)
 }

@@ -1963,7 +1958,7 @@ func (hdlr *Handlers) handleMode(
 		)
 		hdlr.broker.Notify(sessionID)
 		hdlr.respondJSON(writer, request,
-			map[string]string{"status": "ok"},
+			map[string]string{statusKey: "ok"},
 			http.StatusOK)

 		return
@@ -2064,7 +2059,7 @@ func (hdlr *Handlers) queryChannelMode(

 	hdlr.broker.Notify(sessionID)
 	hdlr.respondJSON(writer, request,
-		map[string]string{"status": "ok"},
+		map[string]string{statusKey: "ok"},
 		http.StatusOK)
 }

@@ -2241,7 +2236,7 @@ func (hdlr *Handlers) applyParameterizedMode(
 		)
 		hdlr.broker.Notify(sessionID)
 		hdlr.respondJSON(writer, request,
-			map[string]string{"status": "error"},
+			map[string]string{statusKey: statusError},
 			http.StatusOK)
 	}
 }
@@ -2307,7 +2302,7 @@ func (hdlr *Handlers) applyUserMode(
 	)

 	hdlr.respondJSON(writer, request,
-		map[string]string{"status": "ok"},
+		map[string]string{statusKey: "ok"},
 		http.StatusOK)
 }

@@ -2353,7 +2348,7 @@ func (hdlr *Handlers) setChannelFlag(
 	)

 	hdlr.respondJSON(writer, request,
-		map[string]string{"status": "ok"},
+		map[string]string{statusKey: "ok"},
 		http.StatusOK)
 }

@@ -2437,7 +2432,7 @@ func (hdlr *Handlers) setHashcashMode(
 	)
 	hdlr.broker.Notify(sessionID)
 	hdlr.respondJSON(writer, request,
-		map[string]string{"status": "ok"},
+		map[string]string{statusKey: "ok"},
 		http.StatusOK)
 }

@@ -2486,7 +2481,7 @@ func (hdlr *Handlers) clearHashcashMode(
 	)
 	hdlr.broker.Notify(sessionID)
 	hdlr.respondJSON(writer, request,
-		map[string]string{"status": "ok"},
+		map[string]string{statusKey: "ok"},
 		http.StatusOK)
 }

@@ -2591,7 +2586,7 @@ func (hdlr *Handlers) executeBanChange(
 	}

 	hdlr.respondJSON(writer, request,
-		map[string]string{"status": "ok"},
+		map[string]string{statusKey: "ok"},
 		http.StatusOK)
 }

@@ -2645,7 +2640,7 @@ func (hdlr *Handlers) listBans(

 	hdlr.broker.Notify(sessionID)
 	hdlr.respondJSON(writer, request,
-		map[string]string{"status": "ok"},
+		map[string]string{statusKey: "ok"},
 		http.StatusOK)
 }

@@ -2709,7 +2704,7 @@ func (hdlr *Handlers) setChannelKeyMode(
 	}

 	hdlr.respondJSON(writer, request,
-		map[string]string{"status": "ok"},
+		map[string]string{statusKey: "ok"},
 		http.StatusOK)
 }

@@ -2758,7 +2753,7 @@ func (hdlr *Handlers) clearChannelKeyMode(
 	}

 	hdlr.respondJSON(writer, request,
-		map[string]string{"status": "ok"},
+		map[string]string{statusKey: "ok"},
 		http.StatusOK)
 }

@@ -2833,7 +2828,7 @@ func (hdlr *Handlers) setChannelLimitMode(
 	}

 	hdlr.respondJSON(writer, request,
-		map[string]string{"status": "ok"},
+		map[string]string{statusKey: "ok"},
 		http.StatusOK)
 }

@@ -2883,7 +2878,7 @@ func (hdlr *Handlers) clearChannelLimitMode(
 	}

 	hdlr.respondJSON(writer, request,
-		map[string]string{"status": "ok"},
+		map[string]string{statusKey: "ok"},
 		http.StatusOK)
 }

@@ -3050,7 +3045,7 @@ func (hdlr *Handlers) executeInvite(
 	}

 	hdlr.respondJSON(writer, request,
-		map[string]string{"status": "ok"},
+		map[string]string{statusKey: "ok"},
 		http.StatusOK)
 }

@@ -3119,7 +3114,7 @@ func (hdlr *Handlers) handleNames(

 	hdlr.broker.Notify(sessionID)
 	hdlr.respondJSON(writer, request,
-		map[string]string{"status": "ok"},
+		map[string]string{statusKey: "ok"},
 		http.StatusOK)
 }

@@ -3172,7 +3167,7 @@ func (hdlr *Handlers) handleList(

 	hdlr.broker.Notify(sessionID)
 	hdlr.respondJSON(writer, request,
-		map[string]string{"status": "ok"},
+		map[string]string{statusKey: "ok"},
 		http.StatusOK)
 }

@@ -3262,7 +3257,7 @@ func (hdlr *Handlers) executeWhois(

 	hdlr.broker.Notify(sessionID)
 	hdlr.respondJSON(writer, request,
-		map[string]string{"status": "ok"},
+		map[string]string{statusKey: "ok"},
 		http.StatusOK)
 }

@@ -3287,7 +3282,7 @@ func (hdlr *Handlers) whoisNotFound(
 	)
 	hdlr.broker.Notify(sessionID)
 	hdlr.respondJSON(writer, request,
-		map[string]string{"status": "ok"},
+		map[string]string{statusKey: "ok"},
 		http.StatusOK)
 }

@@ -3454,7 +3449,7 @@ func (hdlr *Handlers) handleWho(
 		)
 		hdlr.broker.Notify(sessionID)
 		hdlr.respondJSON(writer, request,
-			map[string]string{"status": "ok"},
+			map[string]string{statusKey: "ok"},
 			http.StatusOK)

 		return
@@ -3496,7 +3491,7 @@ func (hdlr *Handlers) handleWho(

 	hdlr.broker.Notify(sessionID)
 	hdlr.respondJSON(writer, request,
-		map[string]string{"status": "ok"},
+		map[string]string{statusKey: "ok"},
 		http.StatusOK)
 }

@@ -3512,7 +3507,7 @@ func (hdlr *Handlers) handleLusers(
 	)
 	hdlr.broker.Notify(sessionID)
 	hdlr.respondJSON(writer, request,
-		map[string]string{"status": "ok"},
+		map[string]string{statusKey: "ok"},
 		http.StatusOK)
 }

@@ -3703,10 +3698,10 @@ func (hdlr *Handlers) HandleLogout() http.HandlerFunc {
 			)
 		}

-		hdlr.clearAuthCookie(writer, request)
+		hdlr.clearAuthCookie(writer)

 		hdlr.respondJSON(writer, request,
-			map[string]string{"status": "ok"},
+			map[string]string{statusKey: "ok"},
 			http.StatusOK)
 	}
 }
@@ -3809,7 +3804,7 @@ func (hdlr *Handlers) handleOper(

 	hdlr.broker.Notify(sessionID)
 	hdlr.respondJSON(writer, request,
-		map[string]string{"status": "ok"},
+		map[string]string{statusKey: "ok"},
 		http.StatusOK)
 }

@@ -3857,7 +3852,7 @@ func (hdlr *Handlers) handleAway(

 	hdlr.broker.Notify(sessionID)
 	hdlr.respondJSON(writer, request,
-		map[string]string{"status": "ok"},
+		map[string]string{statusKey: "ok"},
 		http.StatusOK)
 }

@@ -3919,7 +3914,7 @@ func (hdlr *Handlers) handleKick(
 	}

 	hdlr.respondJSON(writer, request,
-		map[string]string{"status": "ok"},
+		map[string]string{statusKey: "ok"},
 		http.StatusOK)
 }

@@ -3943,10 +3938,7 @@ func (hdlr *Handlers) deliverWhoisIdle(
 		return
 	}

-	idleSeconds := int64(time.Since(lastSeen).Seconds())
-	if idleSeconds < 0 {
-		idleSeconds = 0
-	}
+	idleSeconds := max(int64(time.Since(lastSeen).Seconds()), 0)

 	signonUnix := strconv.FormatInt(
 		createdAt.Unix(), 10,
@@ -117,11 +117,11 @@ func (hdlr *Handlers) executeLogin(
 		request, clientID, sessionID, nick,
 	)

-	hdlr.setAuthCookie(writer, request, token)
+	hdlr.setAuthCookie(writer, token)

 	hdlr.respondJSON(writer, request, map[string]any{
-		"id":   sessionID,
-		"nick": nick,
+		"id":    sessionID,
+		nickKey: nick,
 	}, http.StatusOK)
 }

@@ -177,6 +177,6 @@ func (hdlr *Handlers) handlePass(
 	}

 	hdlr.respondJSON(writer, request,
-		map[string]string{"status": "ok"},
+		map[string]string{statusKey: "ok"},
 		http.StatusOK)
 }
@@ -24,6 +24,14 @@ import (

 var errUnauthorized = errors.New("unauthorized")

+// Field names and values used in many JSON responses.
+const (
+	statusKey   = "status"
+	statusError = "error"
+	errorKey    = "error"
+	nickKey     = "nick"
+)
+
 // Params defines the dependencies for creating Handlers.
 type Params struct {
 	fx.In
@@ -137,7 +145,7 @@ func (hdlr *Handlers) respondError(
 ) {
 	hdlr.respondJSON(
 		writer, request,
-		map[string]string{"error": msg},
+		map[string]string{errorKey: msg},
 		status,
 	)
 }
@@ -100,9 +100,10 @@ func (v *Validator) Validate(
 	dateStr := parts[2]
 	resource := parts[3]

-	if err := v.validateHeader(
+	err := v.validateHeader(
 		version, bitsStr, resource, requiredBits,
-	); err != nil {
+	)
+	if err != nil {
 		return err
 	}

@@ -111,13 +112,13 @@ func (v *Validator) Validate(
 		return err
 	}

-	if err := validateTime(stampTime); err != nil {
+	err = validateTime(stampTime)
+	if err != nil {
 		return err
 	}

-	if err := validateProof(
-		stamp, requiredBits,
-	); err != nil {
+	err = validateProof(stamp, requiredBits)
+	if err != nil {
 		return err
 	}

@@ -159,9 +159,7 @@ func (c *Conn) handleJoin(
 		return
 	}

-	channels := strings.Split(msg.Params[0], ",")
-
-	for _, chanName := range channels {
+	for chanName := range strings.SplitSeq(msg.Params[0], ",") {
 		chanName = strings.TrimSpace(chanName)

 		if !strings.HasPrefix(chanName, "#") {
@@ -305,9 +303,7 @@ func (c *Conn) handlePart(
 		reason = msg.Params[1]
 	}

-	channels := strings.Split(msg.Params[0], ",")
-
-	for _, ch := range channels {
+	for ch := range strings.SplitSeq(msg.Params[0], ",") {
 		ch = strings.TrimSpace(ch)
 		c.partChannel(ctx, ch, reason)
 	}
@@ -619,8 +615,8 @@ func (c *Conn) applyChannelModes(
 ) {
 	adding := true
 	argIdx := 0
-	applied := ""
-	appliedArgs := ""
+
+	var applied, appliedArgs strings.Builder

 	for _, modeChar := range modeStr {
 		var res modeResult
@@ -672,16 +668,13 @@ func (c *Conn) applyChannelModes(
 		argIdx += res.consumed

 		if !res.skip {
-			applied += res.applied
-			appliedArgs += res.appliedArgs
+			applied.WriteString(res.applied)
+			appliedArgs.WriteString(res.appliedArgs)
 		}
 	}

-	if applied != "" {
-		modeReply := applied
-		if appliedArgs != "" {
-			modeReply += appliedArgs
-		}
+	if applied.Len() > 0 {
+		modeReply := applied.String() + appliedArgs.String()

 		c.send(FormatMessage(
 			c.hostmask(), "MODE", channel, modeReply,
@@ -62,7 +62,6 @@ type Conn struct {

 	lastQueueID int64
 	closed      bool
-	cancel      context.CancelFunc
 }

 func newConn(
@@ -151,8 +150,10 @@ func resolveHost(ctx context.Context, addr string) string {
 }

 // serve is the main loop for a single IRC client connection.
+// Cancelling ctx when it returns stops the relay goroutine.
 func (c *Conn) serve(ctx context.Context) {
-	ctx, c.cancel = context.WithCancel(ctx)
+	ctx, cancel := context.WithCancel(ctx)
+	defer cancel()
 	defer c.cleanup(ctx)

 	scanner := bufio.NewScanner(c.conn)
@@ -481,7 +482,7 @@ func (c *Conn) deliverMOTD() {
 		"- %s Message of the Day -", c.serverSfx,
 	))

-	for _, line := range strings.Split(motd, "\n") {
+	for line := range strings.SplitSeq(motd, "\n") {
 		c.sendNumeric(irc.RplMotd, "- "+line)
 	}

@@ -282,6 +282,7 @@ func TestIntegrationTwoClients(t *testing.T) {

 	// Both nicks should appear in the name list.
 	foundBothNames := false
+
 	for _, line := range aliceNames {
 		if strings.Contains(line, " 353 ") &&
 			strings.Contains(line, "alice") &&
@@ -671,6 +672,7 @@ func TestIntegrationTwoClients(t *testing.T) {
 	})

 	foundPartErr := false
+
 	for _, line := range bobPartFail {
 		if strings.Contains(line, " 403 ") ||
 			strings.Contains(line, " 442 ") {
@@ -833,6 +835,7 @@ func TestIntegrationModeModerated(t *testing.T) {
 	})

 	foundModErr := false
+
 	for _, line := range bobLines {
 		if strings.Contains(line, " 404 ") ||
 			strings.Contains(line, " 482 ") {
@@ -859,6 +862,7 @@ func TestIntegrationModeModerated(t *testing.T) {
 	})

 	bob.send("PRIVMSG #modtest :voiced message")
+
 	aliceLines := alice.readUntil(func(l string) bool {
 		return strings.Contains(l, "voiced message")
 	})
@@ -4,12 +4,18 @@ import (
 	"testing"

 	"sneak.berlin/go/neoirc/internal/ircserver"
+	"sneak.berlin/go/neoirc/pkg/irc"
 )

 //nolint:funlen // table-driven test
 func TestParseMessage(t *testing.T) {
 	t.Parallel()

+	const (
+		nick    = "alice"
+		channel = "#general"
+	)
+
 	tests := []struct {
 		name    string
 		input   string
@@ -24,10 +30,10 @@ func TestParseMessage(t *testing.T) {
 		},
 		{
 			name:  "simple command",
-			input: "PING",
+			input: irc.CmdPing,
 			want: &ircserver.Message{
 				Prefix:  "",
-				Command: "PING",
+				Command: irc.CmdPing,
 				Params:  nil,
 			},
 			wantNil: false,
@@ -38,7 +44,7 @@ func TestParseMessage(t *testing.T) {
 			want: &ircserver.Message{
 				Prefix:  "",
 				Command: "NICK",
-				Params:  []string{"alice"},
+				Params:  []string{nick},
 			},
 			wantNil: false,
 		},
@@ -57,8 +63,8 @@ func TestParseMessage(t *testing.T) {
 			input: "PRIVMSG #general :hello world",
 			want: &ircserver.Message{
 				Prefix:  "",
-				Command: "PRIVMSG",
-				Params:  []string{"#general", "hello world"},
+				Command: irc.CmdPrivmsg,
+				Params:  []string{channel, "hello world"},
 			},
 			wantNil: false,
 		},
@@ -68,7 +74,7 @@ func TestParseMessage(t *testing.T) {
 			want: &ircserver.Message{
 				Prefix:  "server.example.com",
 				Command: "001",
-				Params:  []string{"alice", "Welcome to IRC"},
+				Params:  []string{nick, "Welcome to IRC"},
 			},
 			wantNil: false,
 		},
@@ -79,7 +85,7 @@ func TestParseMessage(t *testing.T) {
 				Prefix:  "",
 				Command: "USER",
 				Params: []string{
-					"alice", "0", "*", "Alice Smith",
+					nick, "0", "*", "Alice Smith",
 				},
 			},
 			wantNil: false,
@@ -90,7 +96,7 @@ func TestParseMessage(t *testing.T) {
 			want: &ircserver.Message{
 				Prefix:  "",
 				Command: "JOIN",
-				Params:  []string{"#general"},
+				Params:  []string{channel},
 			},
 			wantNil: false,
 		},
@@ -99,17 +105,17 @@ func TestParseMessage(t *testing.T) {
 			input: "QUIT :leaving now",
 			want: &ircserver.Message{
 				Prefix:  "",
-				Command: "QUIT",
+				Command: irc.CmdQuit,
 				Params:  []string{"leaving now"},
 			},
 			wantNil: false,
 		},
 		{
 			name:  "quit without reason",
-			input: "QUIT",
+			input: irc.CmdQuit,
 			want: &ircserver.Message{
 				Prefix:  "",
-				Command: "QUIT",
+				Command: irc.CmdQuit,
 				Params:  nil,
 			},
 			wantNil: false,
@@ -120,7 +126,7 @@ func TestParseMessage(t *testing.T) {
 			want: &ircserver.Message{
 				Prefix:  "",
 				Command: "MODE",
-				Params:  []string{"#general"},
+				Params:  []string{channel},
 			},
 			wantNil: false,
 		},
@@ -131,7 +137,7 @@ func TestParseMessage(t *testing.T) {
 				Prefix:  "",
 				Command: "KICK",
 				Params: []string{
-					"#general", "bob", "misbehaving",
+					channel, "bob", "misbehaving",
 				},
 			},
 			wantNil: false,
@@ -141,8 +147,8 @@ func TestParseMessage(t *testing.T) {
 			input: "PRIVMSG #general :",
 			want: &ircserver.Message{
 				Prefix:  "",
-				Command: "PRIVMSG",
-				Params:  []string{"#general", ""},
+				Command: irc.CmdPrivmsg,
+				Params:  []string{channel, ""},
 			},
 			wantNil: false,
 		},
@@ -161,7 +167,7 @@ func TestParseMessage(t *testing.T) {
 			input: "PING :irc.example.com",
 			want: &ircserver.Message{
 				Prefix:  "",
-				Command: "PING",
+				Command: irc.CmdPing,
 				Params:  []string{"irc.example.com"},
 			},
 			wantNil: false,
@@ -173,7 +179,7 @@ func TestParseMessage(t *testing.T) {
 				Prefix:  "",
 				Command: "TOPIC",
 				Params: []string{
-					"#general",
+					channel,
 					"Welcome to the channel!",
 				},
 			},
@@ -237,6 +243,12 @@ func TestParseMessage(t *testing.T) {
 func TestFormatMessage(t *testing.T) {
 	t.Parallel()

+	const (
+		nick       = "alice"
+		channel    = "#general"
+		serverName = "server"
+	)
+
 	tests := []struct {
 		name    string
 		prefix  string
@@ -247,35 +259,35 @@ func TestFormatMessage(t *testing.T) {
 		{
 			name:    "simple command",
 			prefix:  "",
-			command: "PING",
+			command: irc.CmdPing,
 			params:  nil,
-			want:    "PING",
+			want:    irc.CmdPing,
 		},
 		{
 			name:    "with prefix",
-			prefix:  "server",
+			prefix:  serverName,
 			command: "PONG",
-			params:  []string{"server"},
+			params:  []string{serverName},
 			want:    ":server PONG server",
 		},
 		{
 			name:    "privmsg with trailing",
 			prefix:  "alice!alice@host",
-			command: "PRIVMSG",
-			params:  []string{"#general", "hello world"},
+			command: irc.CmdPrivmsg,
+			params:  []string{channel, "hello world"},
 			want:    ":alice!alice@host PRIVMSG #general :hello world",
 		},
 		{
 			name:    "numeric reply",
-			prefix:  "server",
+			prefix:  serverName,
 			command: "001",
-			params:  []string{"alice", "Welcome to IRC"},
+			params:  []string{nick, "Welcome to IRC"},
 			want:    ":server 001 alice :Welcome to IRC",
 		},
 		{
 			name:    "empty trailing",
-			prefix:  "server",
-			command: "PRIVMSG",
+			prefix:  serverName,
+			command: irc.CmdPrivmsg,
 			params:  []string{"#chan", ""},
 			want:    ":server PRIVMSG #chan :",
 		},
@@ -302,7 +314,7 @@ func TestParseFormatRoundTrip(t *testing.T) {
 	// parameter either contains a space (gets ':' prefix
 	// on format) or is a non-trailing single token.
 	lines := []string{
-		"PING",
+		irc.CmdPing,
 		"NICK alice",
 		"PRIVMSG #general :hello world",
 		"JOIN #general",
@@ -81,22 +81,24 @@ func New(
 // start begins listening for TCP connections.
 //
 //nolint:contextcheck // long-lived server ctx, not the short Fx one
-func (s *Server) start(_ context.Context, addr string) error {
-	ln, err := net.Listen("tcp", addr)
+func (s *Server) start(ctx context.Context, addr string) error {
+	var listenConfig net.ListenConfig
+
+	ln, err := listenConfig.Listen(ctx, "tcp", addr)
 	if err != nil {
 		return fmt.Errorf("irc listen: %w", err)
 	}

 	s.listener = ln

-	ctx, cancel := context.WithCancel(context.Background())
+	serverCtx, cancel := context.WithCancel(context.Background())
 	s.cancel = cancel

 	s.log.Info(
 		"irc server listening", "addr", addr,
 	)

-	go s.acceptLoop(ctx)
+	go s.acceptLoop(serverCtx)

 	return nil
 }
@@ -71,7 +71,9 @@ func newTestEnv(t *testing.T) *testEnv {
 		MOTD:       "Welcome to test IRC",
 	}

-	listener, err := net.Listen("tcp", "127.0.0.1:0")
+	var listenConfig net.ListenConfig
+
+	listener, err := listenConfig.Listen(t.Context(), "tcp", "127.0.0.1:0")
 	if err != nil {
 		t.Fatalf("listen: %v", err)
 	}
@@ -116,10 +118,12 @@ func newTestEnv(t *testing.T) *testEnv {
 func (env *testEnv) dial(t *testing.T) *testClient {
 	t.Helper()

-	conn, err := net.DialTimeout(
+	dialer := net.Dialer{Timeout: testTimeout}
+
+	conn, err := dialer.DialContext(
+		t.Context(),
 		"tcp",
 		env.srv.Listener().Addr().String(),
-		testTimeout,
 	)
 	if err != nil {
 		t.Fatalf("dial: %v", err)
@@ -323,6 +327,7 @@ func TestPrivmsgBetweenClients(t *testing.T) {
 	bob.joinAndDrain("#chat")

 	alice.send("PRIVMSG #chat :hello bob!")
+
 	lines := bob.sendAndExpect("PING :sync", "hello bob!")
 	assertContains(t, lines, "hello bob!", "channel PRIVMSG")
 }
@@ -78,7 +78,9 @@ func New(
 			srv.enableSentry()
 			srv.SetupRoutes()

-			go srv.serve() //nolint:contextcheck
+			// The start hook's context ends when the hook
+			// returns; serving must outlive it.
+			go srv.serve() //nolint:contextcheck,gosec // G118

 			return nil
 		},
@@ -19,6 +19,12 @@ import (
 	"sneak.berlin/go/neoirc/pkg/irc"
 )

+// Error texts that several commands reply with.
+const (
+	msgNoSuchChannel = "No such channel"
+	msgNotChannelOp  = "You're not channel operator"
+)
+
 // Params defines the dependencies for creating a Service.
 type Params struct {
 	fx.In
@@ -142,7 +148,7 @@ func (s *Service) SendChannelMessage(
 		return 0, "", &IRCError{
 			irc.ErrNoSuchChannel,
 			[]string{channel},
-			"No such channel",
+			msgNoSuchChannel,
 		}
 	}

@@ -256,10 +262,11 @@ func (s *Service) JoinChannel(
 	isCreator := countErr == nil && memberCount == 0

 	if !isCreator {
-		if joinErr := checkJoinRestrictions(
+		joinErr := checkJoinRestrictions(
 			ctx, s.db, chID, sessionID,
 			channel, suppliedKey, memberCount,
-		); joinErr != nil {
+		)
+		if joinErr != nil {
 			return nil, joinErr
 		}
 	}
@@ -306,7 +313,7 @@ func (s *Service) PartChannel(
 		return &IRCError{
 			irc.ErrNoSuchChannel,
 			[]string{channel},
-			"No such channel",
+			msgNoSuchChannel,
 		}
 	}

@@ -348,7 +355,7 @@ func (s *Service) SetTopic(
 		return &IRCError{
 			irc.ErrNoSuchChannel,
 			[]string{channel},
-			"No such channel",
+			msgNoSuchChannel,
 		}
 	}

@@ -372,14 +379,13 @@ func (s *Service) SetTopic(
 			return &IRCError{
 				irc.ErrChanOpPrivsNeeded,
 				[]string{channel},
-				"You're not channel operator",
+				msgNotChannelOp,
 			}
 		}
 	}

-	if setErr := s.db.SetTopic(
-		ctx, channel, topic,
-	); setErr != nil {
+	setErr := s.db.SetTopic(ctx, channel, topic)
+	if setErr != nil {
 		return fmt.Errorf("set topic: %w", setErr)
 	}

@@ -409,7 +415,7 @@ func (s *Service) KickUser(
 		return &IRCError{
 			irc.ErrNoSuchChannel,
 			[]string{channel},
-			"No such channel",
+			msgNoSuchChannel,
 		}
 	}

@@ -420,7 +426,7 @@ func (s *Service) KickUser(
 		return &IRCError{
 			irc.ErrChanOpPrivsNeeded,
 			[]string{channel},
-			"You're not channel operator",
+			msgNotChannelOp,
 		}
 	}

@@ -609,7 +615,7 @@ func (s *Service) ValidateChannelOp(
 		return 0, &IRCError{
 			irc.ErrNoSuchChannel,
 			[]string{channel},
-			"No such channel",
+			msgNoSuchChannel,
 		}
 	}

@@ -620,7 +626,7 @@ func (s *Service) ValidateChannelOp(
 		return 0, &IRCError{
 			irc.ErrChanOpPrivsNeeded,
 			[]string{channel},
-			"You're not channel operator",
+			msgNotChannelOp,
 		}
 	}

@@ -682,33 +688,28 @@ func (s *Service) SetChannelFlag(
 ) error {
 	switch flag {
 	case 'm':
-		if err := s.db.SetChannelModerated(
-			ctx, chID, setting,
-		); err != nil {
+		err := s.db.SetChannelModerated(ctx, chID, setting)
+		if err != nil {
 			return fmt.Errorf("set moderated: %w", err)
 		}
 	case 't':
-		if err := s.db.SetChannelTopicLocked(
-			ctx, chID, setting,
-		); err != nil {
+		err := s.db.SetChannelTopicLocked(ctx, chID, setting)
+		if err != nil {
 			return fmt.Errorf("set topic locked: %w", err)
 		}
 	case 'i':
-		if err := s.db.SetChannelInviteOnly(
-			ctx, chID, setting,
-		); err != nil {
+		err := s.db.SetChannelInviteOnly(ctx, chID, setting)
+		if err != nil {
 			return fmt.Errorf("set invite only: %w", err)
 		}
 	case 's':
-		if err := s.db.SetChannelSecret(
-			ctx, chID, setting,
-		); err != nil {
+		err := s.db.SetChannelSecret(ctx, chID, setting)
+		if err != nil {
 			return fmt.Errorf("set secret: %w", err)
 		}
 	case 'n':
-		if err := s.db.SetChannelNoExternal(
-			ctx, chID, setting,
-		); err != nil {
+		err := s.db.SetChannelNoExternal(ctx, chID, setting)
+		if err != nil {
 			return fmt.Errorf(
 				"set no external: %w", err,
 			)
@@ -0,0 +1,6 @@
+{
+    "private": true,
+    "devDependencies": {
+        "prettier": "3.8.1"
+    }
+}
@@ -68,6 +68,7 @@ const (
 // Command responses (200-399).
 const (
 	// RFC 2812 trace/stats/links replies (200-219).
+
 	RplTraceLink       IRCMessageType = 200
 	RplTraceConnecting IRCMessageType = 201
 	RplTraceHandshake  IRCMessageType = 202
@@ -224,7 +225,7 @@ const (

 // names maps numeric codes to their standard IRC names.
 //
-//nolint:gochecknoglobals
+//nolint:gochecknoglobals,gosec // G101: IRC numeric names, not credentials
 var names = map[IRCMessageType]string{
 	RplWelcome:  "RPL_WELCOME",
 	RplYourHost: "RPL_YOURHOST",
@@ -22,19 +22,20 @@ Structured: {"command": "PUBKEY", "body": {"alg": "ed25519", "key": "base64..."}

 Common fields (see `message.json` for full schema):

-| Field     | Type           | Description                                          |
-|-----------|----------------|------------------------------------------------------|
-| `id`      | string (uuid)  | Server-assigned message UUID                         |
-| `command` | string         | IRC command or 3-digit numeric code                  |
-| `from`    | string         | Source nick or server name (IRC prefix)              |
-| `to`      | string         | Target: #channel or nick                             |
-| `params`  | string[]       | Middle parameters (mainly for numerics)              |
-| `body`    | array \| object | Structured body — never a raw string (see below)    |
-| `ts`      | string         | ISO 8601 timestamp (server-assigned, not in raw IRC) |
-| `meta`    | object         | Extensible metadata (signatures, hashes, etc.)       |
+| Field     | Type            | Description                                          |
+| --------- | --------------- | ---------------------------------------------------- |
+| `id`      | string (uuid)   | Server-assigned message UUID                         |
+| `command` | string          | IRC command or 3-digit numeric code                  |
+| `from`    | string          | Source nick or server name (IRC prefix)              |
+| `to`      | string          | Target: #channel or nick                             |
+| `params`  | string[]        | Middle parameters (mainly for numerics)              |
+| `body`    | array \| object | Structured body — never a raw string (see below)     |
+| `ts`      | string          | ISO 8601 timestamp (server-assigned, not in raw IRC) |
+| `meta`    | object          | Extensible metadata (signatures, hashes, etc.)       |

 **Structured bodies:** `body` is always an array of strings (for text) or an
 object (for structured data like PUBKEY). Never a raw string. This enables:
+
 - Multiline messages without escape sequences
 - Deterministic canonicalization via RFC 8785 JCS for signing
 - Structured data where needed
@@ -43,20 +44,20 @@ object (for structured data like PUBKEY). Never a raw string. This enables:

 IRC commands used for client↔server and server↔server communication.

-| Command   | File                      | RFC       | Description                    |
-|-----------|---------------------------|-----------|--------------------------------|
-| `PRIVMSG` | `commands/PRIVMSG.json`  | 1459 §4.4.1 | Message to channel or user  |
-| `NOTICE`  | `commands/NOTICE.json`   | 1459 §4.4.2 | Notice (no auto-reply)      |
-| `JOIN`    | `commands/JOIN.json`     | 1459 §4.2.1 | Join a channel              |
-| `PART`    | `commands/PART.json`     | 1459 §4.2.2 | Leave a channel             |
-| `QUIT`    | `commands/QUIT.json`     | 1459 §4.1.6 | User disconnected           |
-| `NICK`    | `commands/NICK.json`     | 1459 §4.1.2 | Change nickname             |
-| `TOPIC`   | `commands/TOPIC.json`    | 1459 §4.2.4 | Get/set channel topic       |
-| `MODE`    | `commands/MODE.json`     | 1459 §4.2.3 | Set channel/user modes      |
-| `KICK`    | `commands/KICK.json`     | 1459 §4.2.8 | Kick user from channel      |
-| `PING`    | `commands/PING.json`     | 1459 §4.6.2 | Keepalive                   |
-| `PONG`    | `commands/PONG.json`     | 1459 §4.6.3 | Keepalive response          |
-| `PUBKEY`  | `commands/PUBKEY.json`   | (extension)  | Announce/relay signing key  |
+| Command   | File                    | RFC         | Description                |
+| --------- | ----------------------- | ----------- | -------------------------- |
+| `PRIVMSG` | `commands/PRIVMSG.json` | 1459 §4.4.1 | Message to channel or user |
+| `NOTICE`  | `commands/NOTICE.json`  | 1459 §4.4.2 | Notice (no auto-reply)     |
+| `JOIN`    | `commands/JOIN.json`    | 1459 §4.2.1 | Join a channel             |
+| `PART`    | `commands/PART.json`    | 1459 §4.2.2 | Leave a channel            |
+| `QUIT`    | `commands/QUIT.json`    | 1459 §4.1.6 | User disconnected          |
+| `NICK`    | `commands/NICK.json`    | 1459 §4.1.2 | Change nickname            |
+| `TOPIC`   | `commands/TOPIC.json`   | 1459 §4.2.4 | Get/set channel topic      |
+| `MODE`    | `commands/MODE.json`    | 1459 §4.2.3 | Set channel/user modes     |
+| `KICK`    | `commands/KICK.json`    | 1459 §4.2.8 | Kick user from channel     |
+| `PING`    | `commands/PING.json`    | 1459 §4.6.2 | Keepalive                  |
+| `PONG`    | `commands/PONG.json`    | 1459 §4.6.3 | Keepalive response         |
+| `PUBKEY`  | `commands/PUBKEY.json`  | (extension) | Announce/relay signing key |

 ## Numeric Replies

@@ -64,30 +65,30 @@ Three-digit codes for server responses, per IRC convention.

 ### Success / Informational (0xx–3xx)

-| Code  | Name              | File                  | Description                    |
-|-------|-------------------|-----------------------|--------------------------------|
-| `001` | RPL_WELCOME       | `numerics/001.json`  | Welcome after session creation     |
-| `002` | RPL_YOURHOST      | `numerics/002.json`  | Server host info               |
-| `003` | RPL_CREATED       | `numerics/003.json`  | Server creation date           |
-| `004` | RPL_MYINFO        | `numerics/004.json`  | Server info and modes          |
-| `322` | RPL_LIST          | `numerics/322.json`  | Channel list entry             |
-| `323` | RPL_LISTEND       | `numerics/323.json`  | End of channel list            |
-| `332` | RPL_TOPIC         | `numerics/332.json`  | Channel topic                  |
-| `353` | RPL_NAMREPLY      | `numerics/353.json`  | Channel member list            |
-| `366` | RPL_ENDOFNAMES    | `numerics/366.json`  | End of NAMES list              |
-| `372` | RPL_MOTD          | `numerics/372.json`  | MOTD line                      |
-| `375` | RPL_MOTDSTART     | `numerics/375.json`  | Start of MOTD                  |
-| `376` | RPL_ENDOFMOTD     | `numerics/376.json`  | End of MOTD                    |
+| Code  | Name           | File                | Description                    |
+| ----- | -------------- | ------------------- | ------------------------------ |
+| `001` | RPL_WELCOME    | `numerics/001.json` | Welcome after session creation |
+| `002` | RPL_YOURHOST   | `numerics/002.json` | Server host info               |
+| `003` | RPL_CREATED    | `numerics/003.json` | Server creation date           |
+| `004` | RPL_MYINFO     | `numerics/004.json` | Server info and modes          |
+| `322` | RPL_LIST       | `numerics/322.json` | Channel list entry             |
+| `323` | RPL_LISTEND    | `numerics/323.json` | End of channel list            |
+| `332` | RPL_TOPIC      | `numerics/332.json` | Channel topic                  |
+| `353` | RPL_NAMREPLY   | `numerics/353.json` | Channel member list            |
+| `366` | RPL_ENDOFNAMES | `numerics/366.json` | End of NAMES list              |
+| `372` | RPL_MOTD       | `numerics/372.json` | MOTD line                      |
+| `375` | RPL_MOTDSTART  | `numerics/375.json` | Start of MOTD                  |
+| `376` | RPL_ENDOFMOTD  | `numerics/376.json` | End of MOTD                    |

 ### Errors (4xx)

-| Code  | Name                 | File                  | Description                    |
-|-------|----------------------|-----------------------|--------------------------------|
-| `401` | ERR_NOSUCHNICK       | `numerics/401.json`  | No such nick/channel           |
-| `403` | ERR_NOSUCHCHANNEL    | `numerics/403.json`  | No such channel                |
-| `433` | ERR_NICKNAMEINUSE    | `numerics/433.json`  | Nickname already in use        |
-| `442` | ERR_NOTONCHANNEL     | `numerics/442.json`  | Not on that channel            |
-| `482` | ERR_CHANOPRIVSNEEDED | `numerics/482.json`  | Not channel operator           |
+| Code  | Name                 | File                | Description             |
+| ----- | -------------------- | ------------------- | ----------------------- |
+| `401` | ERR_NOSUCHNICK       | `numerics/401.json` | No such nick/channel    |
+| `403` | ERR_NOSUCHCHANNEL    | `numerics/403.json` | No such channel         |
+| `433` | ERR_NICKNAMEINUSE    | `numerics/433.json` | Nickname already in use |
+| `442` | ERR_NOTONCHANNEL     | `numerics/442.json` | Not on that channel     |
+| `482` | ERR_CHANOPRIVSNEEDED | `numerics/482.json` | Not channel operator    |

 ## Federation (S2S)

@@ -0,0 +1,143 @@
+#!/bin/sh
+# script/bootstrap: install all dependencies needed to build and develop
+# this repo. Idempotent: every install is guarded by a check so already
+# installed tools are skipped. Base tooling comes from nix, apt, brew,
+# or apk (detected in that order); assumes nothing is present. Node is
+# used directly if installed; otherwise it is installed at a pinned
+# version via nvm (installing nvm itself first, from a hash-verified
+# release archive, never curl | sh).
+#
+# The Go install at the end of main() is this repo's addition.
+set -eu
+
+ROOT="$(cd "$(dirname "$0")/.." && pwd -P)"
+
+# Pinned versions, 2026-07-06
+NODE_VERSION="22.17.0"
+NVM_VERSION="0.40.3"
+# sha256 of https://github.com/nvm-sh/nvm/archive/refs/tags/v0.40.3.tar.gz
+NVM_SHA256="5f4d6aaa04a177dc93c985e31dbc411ab6b8c6e1e21d8015dbc1372625fcd1d0"
+YARN_VERSION="1.22.22"
+
+PKGMGR=""
+SUDO=""
+
+detect_pkgmgr() {
+    [ -n "$PKGMGR" ] && return 0
+    if command -v nix-env >/dev/null 2>&1; then
+        PKGMGR="nix"
+    elif command -v apt-get >/dev/null 2>&1; then
+        PKGMGR="apt"
+    elif command -v brew >/dev/null 2>&1; then
+        PKGMGR="brew"
+    elif command -v apk >/dev/null 2>&1; then
+        PKGMGR="apk"
+    else
+        echo "bootstrap: no supported package manager (nix, apt, brew, apk)" >&2
+        exit 1
+    fi
+    if [ "$PKGMGR" = "apt" ]; then
+        export DEBIAN_FRONTEND=noninteractive
+        if [ "$(id -u)" != "0" ]; then
+            SUDO="sudo"
+        fi
+    fi
+}
+
+# pkg_install <nix-attr> <apt-pkg> <brew-formula> <apk-pkg>
+pkg_install() {
+    detect_pkgmgr
+    case "$PKGMGR" in
+        nix) nix-env -iA "nixpkgs.$1" ;;
+        apt) $SUDO env DEBIAN_FRONTEND=noninteractive apt-get install -y "$2" ;;
+        brew) brew install "$3" ;;
+        apk) apk add --no-cache "$4" ;;
+    esac
+}
+
+missing() {
+    ! command -v "$1" >/dev/null 2>&1
+}
+
+# verify_sha256 <file> <expected-hash>
+verify_sha256() {
+    if command -v sha256sum >/dev/null 2>&1; then
+        actual="$(sha256sum "$1" | cut -d' ' -f1)"
+    else
+        actual="$(shasum -a 256 "$1" | cut -d' ' -f1)"
+    fi
+    if [ "$actual" != "$2" ]; then
+        echo "bootstrap: sha256 mismatch for $1" >&2
+        echo "  expected: $2" >&2
+        echo "  actual:   $actual" >&2
+        exit 1
+    fi
+}
+
+# nvm is a bash script; run a command in a bash with nvm loaded
+nvm_sh() {
+    bash -c ". \"\$HOME/.nvm/nvm.sh\" && $*"
+}
+
+ensure_nvm() {
+    [ -s "$HOME/.nvm/nvm.sh" ] && return 0
+    # nvm prerequisites; nvm itself requires bash
+    if missing bash; then pkg_install bash bash bash bash; fi
+    if missing curl; then pkg_install curl curl curl curl; fi
+    if missing git; then pkg_install git git git git; fi
+    tmp="$(mktemp -d)"
+    curl -fsSL -o "$tmp/nvm.tar.gz" \
+        "https://github.com/nvm-sh/nvm/archive/refs/tags/v${NVM_VERSION}.tar.gz"
+    verify_sha256 "$tmp/nvm.tar.gz" "$NVM_SHA256"
+    mkdir -p "$HOME/.nvm"
+    tar -xzf "$tmp/nvm.tar.gz" -C "$HOME/.nvm" --strip-components=1
+    rm -rf "$tmp"
+}
+
+ensure_node() {
+    if ! missing node; then return 0; fi
+    ensure_nvm
+    nvm_sh "nvm install $NODE_VERSION"
+}
+
+ensure_yarn() {
+    if ! missing yarn; then return 0; fi
+    if ! missing corepack; then
+        corepack enable
+        corepack prepare "yarn@$YARN_VERSION" --activate
+    elif [ -s "$HOME/.nvm/nvm.sh" ]; then
+        nvm_sh "nvm use $NODE_VERSION >/dev/null && corepack enable && \
+            corepack prepare yarn@$YARN_VERSION --activate"
+    else
+        npm install -g "yarn@$YARN_VERSION"
+    fi
+}
+
+install_js_deps() {
+    if missing yarn && [ -s "$HOME/.nvm/nvm.sh" ]; then
+        nvm_sh "nvm use $NODE_VERSION >/dev/null && cd \"$ROOT\" && \
+            yarn install --frozen-lockfile"
+    else
+        yarn install --frozen-lockfile
+    fi
+}
+
+main() {
+    cd "$ROOT"
+
+    if missing make; then pkg_install gnumake make make make; fi
+    if missing git; then pkg_install git git git git; fi
+
+    ensure_node
+    ensure_yarn
+    install_js_deps
+
+    # Go, for make build, script/precommit and the gofmt step of
+    # script/fmt and script/fmt-check. golangci-lint is not installed: it
+    # runs only in the Dockerfile's lint phase.
+    if missing go; then pkg_install go golang go go; fi
+
+    echo "bootstrap complete"
+}
+
+main "$@"
@@ -0,0 +1,16 @@
+#!/bin/sh
+# script/check: run all checks (test, lint, fmt-check). Our own
+# extension to scripts-to-rule-them-all. test and lint are Docker
+# phases; fmt-check is native, because a formatter writes the working
+# tree. Must not modify any files.
+set -eu
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd -P)"
+
+main() {
+    "$SCRIPT_DIR/test"
+    "$SCRIPT_DIR/lint"
+    "$SCRIPT_DIR/fmt-check"
+}
+
+main "$@"
@@ -0,0 +1,28 @@
+#!/bin/sh
+# script/cibuild: run the CI build. It bootstraps first: a CI runner
+# checks out and runs this and nothing else, and script/fmt-check runs
+# the formatter on the host, which a pristine checkout cannot do.
+# --no-cache for the same reason as script/docker: the gate phases the
+# final stage depends on are RUN steps, and a cached one is a check that
+# did not run.
+set -eu
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd -P)"
+ROOT="$(cd "$SCRIPT_DIR/.." && pwd -P)"
+
+main() {
+    cd "$ROOT"
+    "$SCRIPT_DIR/bootstrap"
+    "$SCRIPT_DIR/check"
+    # Own line: a failing command substitution inside an argument does
+    # not trip `set -e`, so the inline form degrades silently to an
+    # empty constant. The VERSION build argument takes precedence over
+    # the version a build stage derives from the .git in the context.
+    version="$(git describe --tags --always --dirty 2>/dev/null || true)"
+    [ -n "$version" ] || version="unknown"
+    docker build --no-cache \
+        --build-arg VERSION="$version" \
+        -t "$("$SCRIPT_DIR/projectname")" .
+}
+
+main "$@"
@@ -0,0 +1,24 @@
+#!/bin/sh
+# script/docker: build the Docker image tagged with the project name.
+# Identical in all repos; the tag comes from script/projectname.
+# --no-cache because the gate phases the final stage depends on are RUN
+# steps, and a cached one is a check that did not run.
+set -eu
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd -P)"
+ROOT="$(cd "$SCRIPT_DIR/.." && pwd -P)"
+
+main() {
+    cd "$ROOT"
+    # Own line: a failing command substitution inside an argument does
+    # not trip `set -e`, so the inline form degrades silently to an
+    # empty constant. The VERSION build argument takes precedence over
+    # the version a build stage derives from the .git in the context.
+    version="$(git describe --tags --always --dirty 2>/dev/null || true)"
+    [ -n "$version" ] || version="unknown"
+    docker build --no-cache \
+        --build-arg VERSION="$version" \
+        -t "$("$SCRIPT_DIR/projectname")" .
+}
+
+main "$@"
@@ -0,0 +1,35 @@
+#!/bin/sh
+# script/fmt: format all files (writes).
+#
+# The gofmt step in main() is this repo's addition.
+set -eu
+
+ROOT="$(cd "$(dirname "$0")/.." && pwd -P)"
+
+# Must match the pin in script/bootstrap.
+NODE_VERSION="22.17.0"
+
+# script/bootstrap installs node and yarn under nvm and leaves neither
+# on the PATH of the shell that called it, so resolve the pinned
+# toolchain here the way bootstrap's own install step does. nvm is a
+# bash script, hence the subshell.
+run_yarn() {
+    if command -v yarn >/dev/null 2>&1; then
+        exec yarn "$@"
+    fi
+    if [ ! -s "$HOME/.nvm/nvm.sh" ]; then
+        echo "fmt: no yarn; run script/bootstrap first" >&2
+        exit 1
+    fi
+    exec bash -c '. "$HOME/.nvm/nvm.sh" && nvm use "$1" >/dev/null &&
+        shift && exec yarn "$@"' bash "$NODE_VERSION" "$@"
+}
+
+main() {
+    cd "$ROOT"
+    # Before prettier, because run_yarn replaces this shell with yarn.
+    gofmt -s -w .
+    run_yarn run prettier --write '**/*.md' --tab-width 4 --prose-wrap always
+}
+
+main "$@"
@@ -0,0 +1,40 @@
+#!/bin/sh
+# script/fmt-check: check formatting (read-only).
+#
+# The gofmt check in main() is this repo's addition.
+set -eu
+
+ROOT="$(cd "$(dirname "$0")/.." && pwd -P)"
+
+# Must match the pin in script/bootstrap.
+NODE_VERSION="22.17.0"
+
+# script/bootstrap installs node and yarn under nvm and leaves neither
+# on the PATH of the shell that called it, so resolve the pinned
+# toolchain here the way bootstrap's own install step does. nvm is a
+# bash script, hence the subshell.
+run_yarn() {
+    if command -v yarn >/dev/null 2>&1; then
+        exec yarn "$@"
+    fi
+    if [ ! -s "$HOME/.nvm/nvm.sh" ]; then
+        echo "fmt-check: no yarn; run script/bootstrap first" >&2
+        exit 1
+    fi
+    exec bash -c '. "$HOME/.nvm/nvm.sh" && nvm use "$1" >/dev/null &&
+        shift && exec yarn "$@"' bash "$NODE_VERSION" "$@"
+}
+
+main() {
+    cd "$ROOT"
+    # Before prettier, because run_yarn replaces this shell with yarn.
+    unformatted="$(gofmt -s -l .)"
+    if [ -n "$unformatted" ]; then
+        echo "fmt-check: run make fmt; gofmt would change:" >&2
+        echo "$unformatted" >&2
+        exit 1
+    fi
+    run_yarn run prettier --check '**/*.md' --tab-width 4 --prose-wrap always
+}
+
+main "$@"
@@ -0,0 +1,16 @@
+#!/bin/sh
+# script/install-precommit: install the git pre-commit hook that runs
+# script/precommit. Our own extension to scripts-to-rule-them-all.
+set -eu
+
+ROOT="$(cd "$(dirname "$0")/.." && pwd -P)"
+
+main() {
+    cd "$ROOT"
+    hook=".git/hooks/pre-commit"
+    printf '#!/bin/sh\nset -e\nscript/precommit\n' > .git/hooks/pre-commit
+    chmod +x .git/hooks/pre-commit
+    echo "pre-commit hook installed: runs script/precommit"
+}
+
+main "$@"
@@ -0,0 +1,23 @@
+#!/bin/sh
+# script/lint: run the linter. Linting is a phase of the Dockerfile and
+# this builds that phase alone; the linter is never installed or run on
+# a developer host, where a shared result cache and a host-global lock
+# make its answer untrustworthy.
+#
+# The phase is not the last stage in the file, so it is built only when
+# --target names it. --no-cache because a cached lint layer is a lint
+# that did not run. The tag makes each build replace the previous image
+# instead of leaving a dangling one behind.
+set -eu
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd -P)"
+ROOT="$(cd "$SCRIPT_DIR/.." && pwd -P)"
+
+main() {
+    cd "$ROOT"
+    docker build --no-cache \
+        --target lint \
+        -t "$("$SCRIPT_DIR/projectname")-lint" .
+}
+
+main "$@"
@@ -0,0 +1,23 @@
+#!/bin/sh
+# script/precommit: run by the git pre-commit hook; fails the commit if
+# checks fail. Our own extension to scripts-to-rule-them-all.
+#
+# This repo's addition: go mod tidy runs first, failing the commit if it
+# changes go.mod or go.sum.
+set -eu
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd -P)"
+ROOT="$(cd "$SCRIPT_DIR/.." && pwd -P)"
+
+main() {
+    cd "$ROOT"
+    go mod tidy
+    git diff --exit-code -- go.mod go.sum || {
+        echo "precommit: go mod tidy changed go.mod or go.sum;" \
+            "stage the changes and retry" >&2
+        exit 1
+    }
+    "$SCRIPT_DIR/check"
+}
+
+main "$@"
@@ -0,0 +1,12 @@
+#!/bin/sh
+# script/projectname: output the name of this project. Our own
+# extension to scripts-to-rule-them-all. Other scripts that need the
+# name (e.g. script/docker) call this, so they can stay identical
+# across all repos.
+set -eu
+
+main() {
+    echo "neoirc"
+}
+
+main "$@"
@@ -0,0 +1,13 @@
+#!/bin/sh
+# script/setup: set up the repo for development after a fresh clone:
+# installs dependencies and the git pre-commit hook.
+set -eu
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd -P)"
+
+main() {
+    "$SCRIPT_DIR/bootstrap"
+    "$SCRIPT_DIR/install-precommit"
+}
+
+main "$@"
@@ -0,0 +1,19 @@
+#!/bin/sh
+# script/test: run the test suite. Testing is a phase of the Dockerfile
+# and this builds that phase alone, on the same terms as script/lint:
+# --target because a phase that is not the last stage is built only when
+# named, --no-cache because a cached test layer is a test that did not
+# run, and a tag so each build replaces the previous image.
+set -eu
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd -P)"
+ROOT="$(cd "$SCRIPT_DIR/.." && pwd -P)"
+
+main() {
+    cd "$ROOT"
+    docker build --no-cache \
+        --target test \
+        -t "$("$SCRIPT_DIR/projectname")-test" .
+}
+
+main "$@"
@@ -0,0 +1,8 @@
+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+
+prettier@3.8.1:
+  version "3.8.1"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-3.8.1.tgz#edf48977cf991558f4fcbd8a3ba6015ba2a3a173"
+  integrity sha512-UOnG6LftzbdaHZcKoPFtOcCKztrQ57WkHDeRD9t/PTQtmT0NHSeWWepj6pS0z/N7+08BHFDQVUrfmfMRcZwbMg==