loopd: write the next epoch from a compaction summary

Co-Authored-By: ornith-1.5-35b-a3b <agent@wntrmute.dev>

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 |
 |---|---|---|---|---|---|---|---|
+| M5d1/07-loopd-compact-advance | 2026-10-03 | done | 2 | pass | none | Copied the given test `crates/loopd/tests/compact_advance.rs` (new). Step 2 (`cargo build --tests --keep-going -p loopd`) showed exactly the named failure: `compact_advance` with E0425 (`cannot find function commit in module compact`); every other target compiled. Made S1 (`session.rs`: `begin_epoch` after `log_path`, in that order — writes `<n>.baseline.json` with `to_json`, `create_new` the `<n>.jsonl`, accumulates `prior_users`/`prior_untrusted` from the old `records` before clearing them, sets `epoch`/`baseline`/`carry`/empty `records`/the new `File`, then `persist` `SessionStart` with the live `slot`; does not reset `next_call` or `slot`). Made C1 (`compact.rs`: extended the `use crate::` group to `Baseline`/`MemorySource`/`Registry` and the bxcore group to `Epoch`/`Timestamp`, then added `commit` after `summarise` — skips the append and takes `next`/summary from a trailing `EpochEnd`, else appends `EpochEnd` with `Epoch(epoch.0.saturating_add(1))`, reads `memory.block()` as `Failed`, `Baseline::assemble_with(cfg, registry, &block)` as `Failed`, then `begin_epoch`). `cargo check -p loopd` clean, no error or warning. `wc -l crates/loopd/src/session.rs` prints 438 and `crates/loopd/src/compact.rs` prints 134, each ≤ 500. `cargo test -p loopd --test compact_advance --test session_epochs --test compact_summary` passes: 6 in `compact_advance`, 9 in `session_epochs`, 6 in `compact_summary`. `git diff --stat` lists only `session.rs` and `compact.rs`; `git status --short` shows `compact_advance.rs` as new. `make gate` printed `gate: ok` with 1502 tests (1496 before, plus the 6 of `compact_advance.rs`). No new dependency, so `Cargo.lock` unchanged. | ornith-1.5-35b-a3b |
 | M5d1/05-loopd-compact-due | 2026-10-03 | done | 1 | pass | none | Copied the given test `crates/loopd/tests/compact_due.rs` and the starter `config/compact.md` from `docs/plans/M5d1/files/`. Created `crates/loopd/src/compact.rs`: `due` does `cache_n.saturating_add(prompt_n) as f64 >= threshold * (n_ctx as f64)`; `fallback_summary` `filter_map`s `LogRecord::User { content, .. }` to `&str`, reverses, joins `"\n\n"`, then `cap_chars`; `cap_chars` is the given `chars().take(n)`. Added `pub mod compact;` after `pub mod channel;` in `lib.rs` (rustfmt order, accepted). `cargo check -p loopd` clean, no error or warning. `cargo test -p loopd --test compact_due` passes all 6. `git diff --stat` lists only `lib.rs` and `compact.rs`; `git status --short` shows `compact_due.rs` and `compact.md` as new. `make gate` printed `gate: ok` with 1490 tests (1484 before, plus the 6 of `compact_due.rs`). No new dependency, so `Cargo.lock` unchanged. | ornith-1.5-35b-a3b |
 | M5d1/04-memoryd-honcho-epochs | 2026-10-02 | done | 1 | pass | none | Copied the given test `crates/memoryd/tests/honcho_epochs.rs` (new). Step 2 (`cargo build --tests --keep-going -p memoryd`) showed exactly the named failure: `honcho_epochs` with one E0432 (`unresolved import memoryd::honcho::turns::read_session`); every other target compiled. Made H1 (`turns.rs`: `log_path` doc now names the sibling epoch files and that `read_session` concatenates them), H1b (inserted `epoch_logs` after `read_records`: lists `<n>.jsonl` under `sessions/<id>/`, `n` parsed as `u32`, sorted by `n`, a missing directory empty; then `read_session` concatenates `read_records` over each), H2 (`resume` reads `read_session` instead of `read_log(&log_path(...))`), H3 (`records` matches `read_session(...).map_err(|e| e.to_string())`, keeping the logged line shape); W1 (`worker.rs`: added `use ...decide::{final_reply, turn_records, user_text}` and `use ...turns::{LogError, TurnSync, log_path, read_session}`), W2 (`send_turn` loads `read_session`, `self.readable(&path)` on Ok, `LogError::Damaged(_)` -> `Unsent::Local("log")`, other error -> `Unsent::Unreadable(e.to_string())`, then `turn_records`/`user_text`/`final_reply` from `decide`), W3 (`batch` called with `text`/`reply` by value, no borrow). `read_turn` no longer used in the worker body but stays re-exported. `cargo check -p memoryd` clean, no error or warning. `wc -l` prints 369 for `turns.rs` and 453 for `worker.rs`, each ≤ 500. `cargo test -p memoryd --test honcho_epochs --test honcho_turns --test honcho_worker` passes: 6 in `honcho_epochs`, 16 in `honcho_turns`, 12 in `honcho_worker`. `git diff --stat` lists only `turns.rs` and `worker.rs`; `cargo fmt --all` changed nothing after the edits. `make gate` printed `gate: ok` with 1484 tests (1478 before, plus the 6 of `honcho_epochs.rs`). No new dependency, so `Cargo.lock` unchanged. | ornith-1.5-35b-a3b |
 | M5d1/03-loopd-carry-messages | 2026-10-02 | done | 2 | pass | none | Copied the given test `crates/loopd/tests/carry_messages.rs` (new). Step 2 (`cargo build --tests --keep-going -p loopd`) showed exactly the named failure: `carry_messages` with one E0432 (`unresolved import loopd::baseline::{CARRY_HEADING, messages_with_carry}`); every other target compiled. Made B1 (`baseline.rs`: `CARRY_HEADING` = `concat!("Earlier ", "turns, summarised:")`, `messages` becomes `messages_with_carry(baseline, records, None)`, new `messages_with_carry` inserts the heading plus a blank line plus the summary as one `ChatMessage::User` after the system prompt and before walking `records`; the rest of the `match` untouched); T1 (`turn.rs`: `use crate::baseline::messages_with_carry`); T2 (`run_turn` passes `session.carry()`). `cargo check -p loopd` clean, no error or warning. `cargo test -p loopd --test carry_messages --test baseline --test turn` passes: 5 in `carry_messages`, 6 in `baseline`, 6 in `turn`. `git diff --stat` lists only `baseline.rs` and `turn.rs`; `cargo fmt --all` changed nothing. `make gate` printed `gate: ok` with 1478 tests (1473 before, plus the 5 of `carry_messages.rs`). No new dependency, so `Cargo.lock` unchanged. | ornith-1.5-35b-a3b |