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boxmaker/docs/plans/M5a/04-memoryd-entries-check.md
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kyleandClaude Opus 5.5 de1032157b Plan M5a: local memory in 15 tasks
memoryd (files, the check, edits, journal, index, recall, serving),
the memory tools and built-in grants in brokerd, the memory block in
loopd, bxctl reindex and memory, and the device checks with memoryd.

Each task was built as a reference and gated. Each was replayed on its
own at its end state (854 to 936 tests) and mutation-checked. Each
skeleton compiles and fails its tests. Every todo comment was read
beside its signature.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
2026-09-24 15:32:54 -07:00

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# M5a task 04: entries and the check
**Branch:** `m5a` (run `git switch m5a`; `git status --short` must be empty, otherwise stop)
**Commit subject:** `memoryd: entries, and the check on every memory write`
## Goal
Two small modules (M5a spec, section 3 and section 5, "The check"):
- `entries`: `memory.md` and `user.md` are entries separated by a line holding only `§`. Parse,
render, and measure a file in characters.
- `check`: every entry the agent writes, and every identity entry going into the prompt, is
refused if it holds a control character (other than newline and tab), an invisible or
direction-changing character, chat-template markup, or one of six instruction phrases. The
table of invisible characters is written in the skeleton, from Unicode 16's
`Default_Ignorable_Code_Point` property, plus six more.
## Files
- Copy (skeletons): `crates/memoryd/src/entries.rs`, `crates/memoryd/src/check.rs`
- Copy (tests): `crates/memoryd/tests/entries.rs`, `crates/memoryd/tests/check.rs`
- Modify: `crates/memoryd/src/lib.rs`, `docs/implementer-log.md`
## The edits, exactly
**`crates/memoryd/src/lib.rs`:** add `pub mod check;` before `pub mod config;`, and
`pub mod entries;` after it. The file then lists `check`, `config`, `entries`, `socket`.
## The skeletons
`entries.rs`: fill `parse`, `push`, `render`, `size`. `check.rs`: `Refused` and its sentences,
`DEFAULT_IGNORABLE`, `ALSO_INVISIBLE`, `MARKUP` and `PHRASES` are written; fill `invisible` and
`check`. Do not change the tables.
## Steps
- [ ] **1. Copy** the four files; edit `lib.rs`.
- [ ] **2. See it fail.** `cargo test -p memoryd --test entries --test check`: `entries` 3 failed,
`check` 6 failed.
- [ ] **3. Fill** the six functions. `cargo fmt --all`.
- [ ] **4. See it pass.** The same command: 3 and 6 passed.
- [ ] **5. Run the gate.** `make gate`: `gate: ok`, 9 more tests than before (about 877).
- [ ] **6. Log and commit.** `git add -A crates/memoryd docs/implementer-log.md Cargo.lock && git commit`
## Done when
- `make gate` prints `gate: ok`.
## Stop and report if
- A test fails after the functions follow their comments exactly.