[JacobStephens2]

Summary

One module now owns every session kind. It writes and reads the Session-log token, gives the Command record stage and applies the --session rule. Callers pass a typed kind. Below the session runner the token stays a plain label.

 src/session/
+├── kind.rs          # Kind, Logged { kind, resume }: token, read, stage, selects
 ├── recording.rs
 src/session.rs       # Sessions::run(kind: Kind, …) — was kind: &str
 src/logs.rs          # session(): if/else ladder ending `else { return; }`  →  session.stage()
 src/logs/reading/selection.rs   # --session matching  →  kind::selects

-sessions.run_to_final_message(purpose, &format!("security-reproduction-{number}"), &prompt)
+sessions.run_to_final_message(purpose, Kind::SecurityReproduction(number), &prompt)
-Ok((format!("repair-{}", self.repairs), line))
+Ok((Kind::Repair(self.repairs), line))

The stage comes from one exhaustive match. A Resume of the implement session, Spec review, a Repair or Security review enters Resume. Any other Resume keeps its own kind's stage, as on main.

Seams under test:

• the session::kind interface: round-trip, stage table, --session rules, malformed tokens
• the session runner's typed interface: existing session.rs / execution_tests.rs tests
• the Repair loop's and Delivery's recorded calls, now typed kinds

Evidence

• Before: a token with no matching rung fell through else { return; } and recorded no stage, and nothing at compile time caught it.
  After: cargo test --bin thirdshift session::kind passes 6 tests:

  • every_kind_reads_back_from_its_token_and_its_resumes
  • each_session_enters_its_command_record_stage
  • a_session_word_selects_its_token_its_kind_or_any_repair
  • repair_selects_the_numbers_it_has_always_read_and_no_others
  • an_unreadable_token_is_selected_by_itself_or_without_its_resume
  • malformed_tokens_read_back_as_no_kind

• No integration test under tests/ changed: Session log names, show/logs --session and Command record stages. Full cargo test: 52 binaries, 2052 passed, 0 failed. cargo clippy --all-targets is clean.

• Review follow-up: the Spec reviewer's probes failed on the first commit, as the finding said:

  • selects("legacy", "legacy-resume")
  • selects("repair", "repair-+1")
  • !selects("repair-1", "repair-01")

  The fix restores main's --session rules for every token, and the probes are now kept as tests.

Merge Danger

Door: two-way

A refactor with no on-disk change: log file names, Model evidence and Command record stage names are unchanged.

Blast Radius: internal

Only in-crate callers of Sessions::run / run_to_final_message change.

Unaddressed findings

Standards

• Two-way module dependency (src/session/kind.rs uses crate::logs::Stage; src/logs.rs and src/logs/reading/selection.rs use crate::session). Declined because the plan decided it. Issue Name every session by a typed session kind that owns its log token, stage and --session rule #873 Decision: "The module lives with sessions, and the logs module reads it … the logs module gains a dependency on it for the stage and --session rules."
• Middle Man: logs::session (src/logs.rs, pub fn session(session: Logged, path: &Path) { record().stage(session.stage(), Some(path)); }). Declined. It still hides the process-wide record(), so session never touches the Command record directly. Issue Name every session by a typed session kind that owns its log token, stage and --session rule #873 keeps the stage recorded through the logs module.
• Speculative Generality: pub fields plus Logged::of / Logged::resume_of (src/session/kind.rs). Declined because both are used:
  • The constructors name intent at the runner's call sites (Logged::resume_of(kind) in src/session.rs).
  • selects destructures the fields (Logged { kind: Kind::Repair(_), .. }).
• Fully qualified crate::session::Kind in src/spec_run.rs tests. Declined. Kind there is already crate::child_run::Kind (src/spec_run.rs:19, use crate::child_run::{Ended, Kind, Runs};). The same finding is fixed in src/logs.rs, which now imports Logged.

Spec

None. Both findings were fixed (see Evidence).

Security review outcome

No unaddressed introduced findings.

Review coverage

Both reviewers read every changed file. No generated-output exclusions.

Closes #873

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