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simplexcalc/docs/TODO.md
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Write exact results past the range of a double (closes #16)
An exact result outside the normal range of a double, such as 2^1200,
10^400 or 2^-1200, was refused because format wrote every result
through float64. Such a result is now written from its exact value,
rounded to 17 significant digits with trailing zeros dropped, through a
big.Float precise enough to round as the exact value would. Results
inside the range are written as before, and a power computed in float64
must still be a normal double. The tests check the written text of these
results, the refusals just past the 4096-bit limit, and the time taken
to write the largest and smallest numbers under it.

Model: opus-5-5
2026-09-29 06:18:19 +00:00

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Markdown

# Workflow
- branch (from `main`)
- do the work in Next Step
- move Next Step to the top of Completed Steps
- move the top item of Future Steps into Next Step
- commit (`docs/TODO.md` changes in the same commit as the work)
- merge to `main` if the branch is not protected, otherwise open a PR
- push
# Status
pre-1.0. No git tags exist. `main` is a working bot: one container image
holding the bot and the SimpleX Chat command-line client v7.0.2, a bot
profile named `calc` with a long-term address that accepts every contact
request, and exact arithmetic replies (`+ - * /`, parentheses,
decimals). The Gitea issue tracker is the authoritative list of work;
this file mirrors it.
# Next Step
Adopt the canonical `.golangci.yml` from the `prompts` repository once
it replaces `gomodguard` with `gomodguard_v2`. golangci-lint v2.12.2
warns on every run that `gomodguard` is deprecated. The file is
maintained upstream and is not edited here; done when `make lint` runs
with no deprecation warning.
# Completed Steps
- 2026-09-29 Exact results past the range of a double, such as `2^1200`,
are written to 17 significant digits instead of being refused
- 2026-09-29 `GET` and `POST /api/v1/chats/{id}/messages`: a chat's
latest messages, and sending one
- 2026-09-29 Added the HTTP API in `internal/api`: the server on `PORT`,
the bearer credential from `API_TOKEN_FILE`, security headers and
limits, and `GET /api/v1/chats`
- 2026-09-28 Powers (`^`, also written `**`) and remainders (`%`) in
`internal/calc`, which now reads expressions with a parser of its own
in place of `go/parser`
- 2026-09-28 Moved the command tree and the `run` and `version` commands
from `cmd/simplexcalc/` into `internal/cli`; `cmd/simplexcalc/main.go`
is now a single call to `cli.Main`
- 2026-09-26 Seeded from `go-template-repo` (renamed, its HTTP service
removed) and built the bot: `internal/calc` for the arithmetic,
`internal/simplex` for the chat client process and its WebSocket API,
`internal/bot` for address setup and replies, and a runtime image on
Ubuntu 22.04 carrying the checksum-verified `simplex-chat` binary
# Future Steps
none