brokerd: policy and ledger as modules, before the memory tools

Implemented-By: OpenCode session (model recorded in docs/implementer-log.md)

docs/implementer-log.md

@@ -6,6 +6,7 @@ reviewer adds findings under "Reviews" once per milestone.
 
 | Task | Date | Status | Gate runs | First gate | Deviations | Notes | Model |
 |---|---|---|---|---|---|---|---|
+| M5a/01-brokerd-split | 2026-09-24 | done | 1 | pass | none | Pure move, no line of code edited. Moved `crates/brokerd/src/policy.rs` to `policy/mod.rs` and cut from the `MatchResult` doc comment to end of file into `policy/matching.rs` (the `MatchResult` struct, `Candidate`, and `match_grants`/`winner`/`build_matched`, which keeps the private helpers `covers`/`best_path`/`better`/`combined_label` beside them). Added `pub(super)` to `MatchResult` and its three fields, `Candidate` and all its fields, and `match_grants`/`winner`/`build_matched`; in `policy/mod.rs` replaced the three `use` lines with `mod matching;` then `use matching::{MatchResult, build_matched, match_grants, winner};`. Moved `ledger/answer` through `finish` into `ledger/answer.rs` inside `impl Ledger { … }` with the task's header and a closing `}` after `finish`; in `ledger/mod.rs` added `mod answer;` before the `use std::sync` line and dropped `ApprovalAnswer` from the proto import (used only in `answer.rs`). `cargo fmt --all`, `cargo check -p brokerd` clean, all 38 brokerd suites pass including the two `compile_fail` doc tests, test count unchanged. `wc -l` shows 187/320/204/296, all under 500. `make gate` prints `gate: ok` on the first run. | ? |
 | M4b/18-gatewayd-redirect | 2026-09-24 | done | 6 | fail | none | Copied `serve_redirect.rs` and a new `serve_approvals.rs` (the unfollowed-session test now expects 3 posts: a first post then two parts) into `crates/gatewayd/tests/`. In `serve/mod.rs`: added `authors: HashMap<SessionId,(String,String)>` and `askers: HashMap<String,approvals::Asker>` fields after `open` and their `HashMap::new()` initialisers. In `serve/approvals.rs`: import `Asked`; the `Asker { user, channel_type, prompt }` and `Place { channel, root, first, note }` types before `Open`; `place` now returns `Place` and checks in order (no turn in flight -> unfollowed, else a non-approver asker in a D/G channel -> redirected with `asked_post` and a note, else its thread) with a new `approver_dm` helper; `show` builds `bodies` from `place.first` then the parts, posts the first post, and after posting and registering posts the `sent_to_approver` note. In `serve/handle.rs`: `handle_post` records `authors` on Queue; `start` fills `askers` from `authors` before the move; `finished` removes `askers` and, when the queue has no next batch, `authors`. `cargo fmt --all` then `cargo check` clean. `make gate` printed `gate: ok` on 5 of 6 runs; the one non-passing run was a rare thread-scheduling flake in `serve_restart`'s `a_restart_reports_the_cut_off_turn_and_catches_up` (two turns spawned in catch-up, received in completion order) -- confirmed pre-existing by running 40/40 on my code and 30/30 on the stashed original under parallel load, since my change does not touch catch-up or spawn ordering. | ? |
 | M4b/17-gatewayd-asked-texts | 2026-09-24 | done | 1 | pass | none | Copied `docs/plans/M4b/files/crates/gatewayd/tests/approvals_asked.rs` into `crates/gatewayd/tests/`. In `approvals/text.rs` appended after `with_ending` exactly as the task gives: `PROMPT_SHOWN` (2_000), the `Asked { by, channel_type, prompt }` struct, `asked_post` (route on `channel_type` for the place string, escape the prompt with `escape_model_text`, count chars with `chars()` not `len()`, show the first `PROMPT_SHOWN` and say how many more), `unfollowed_post` (session through `code`), and `sent_to_approver`. `cargo fmt --all` then `cargo test -p gatewayd --test approvals_asked` 4 passed, `cargo test -p gatewayd` every suite green, `make gate` prints `gate: ok` on the first run. | ? |
 | M4b/16-brokerd-refusing-message | 2026-09-24 | done | 1 | pass | none | Copied `docs/plans/M4b/files/crates/brokerd/tests/runner.rs` into `crates/brokerd/tests/`; the new version asserts the new `REFUSING` sentence. In `crates/brokerd/src/runner.rs` the `REFUSING` const changed from "the runner arrives in M3b" to "no tool runner is configured: brokerd.toml has no [runner] section"; the doc comment above it unchanged. The copy failed first on that one assertion (the sentence), then passed after the change; `cargo test -p brokerd` every suite green; `make gate` prints `gate: ok` on the first run. `loopd/tests/broker_port.rs` left alone (old sentence is only test data there). | ? |