odd: P1.3.2 closeout ledger + supersede obsolete handoffs

[klappy]

P1.3.2 closeout — mirrors P1.3.1's ledger pattern.

What this ships

New: odd/ledger/2026-04-20-p1-3-2-gate-canary-landed.md — retrospective record of the 2026-04-20T01:21Z–03:20Z session that landed oddkit_gate 0.20.0 end-to-end (canon → code → prod) in 1h 58m.

Superseded (status flipped, left in canon for reference):

• odd/handoffs/2026-04-21-p1-3-2-gate-canary.md — original two-phase handoff; all scope shipped in feat(gate): governance-driven BM25 + set intersection + envelope (0.20.0) oddkit#118.
• odd/handoffs/2026-04-20-p1-3-2-phase-2-gate-code-refactor.md — mid-session Phase 2 forward handoff. Phase 2 shipped in the same session; this handoff was superseded within ~45 min of its own merge. Left in canon as example of "same-session handoff anti-pattern" discussed in the ledger's Patterns section.

Ledger structure

Mirrors klappy://odd/ledger/2026-04-20-p1-3-1-challenge-canary-landed:

• Summary (blockquote with compressed argument)
• Summary — What Shipped and What the Session Proved
• What Shipped (5-PR table: odd/gate: canon governance docs for P1.3.2 gate vodka refactor (Phase 1) #120 Phase 1 canon, handoff: P1.3.2 Phase 2 forward handoff #121 mid-session handoff, odd/gate/transitions: add inflected forms for geminating verbs #122 canon amendment, odd: P1.2 closeout ledger + P1.3.1 forward handoff #118 feature, odd: P1.3.1 closeout ledger + P1.3.2 gate forward handoff #119 promotion)
• What the Validator Actually Checked (honest accounting of smoke-heavy attestation vs Sonnet 4.6 5-corroboration — nine smoke runs + live self-call vs P1.3.1's five Sonnet corroborations + five prod-smoke runs; tradeoff is real; smoke catches mechanical bugs, Sonnet catches intent drift; neither substitutes for the other)
• Patterns Observed (split-by-fit, cache-parse-products, smoke-catches-real-bugs, canon-beats-code-extension-for-vocabulary-fixes, same-session-handoff-anti-pattern)
• What Is Cleared from the Prior Handoffs
• What Remains Open (carry-forward O-opens P2–P7)
• What This Session Added to the Carry List (gemination gap; principle candidates)
• Session Mechanics — What Worked and What Didn't (blunt on preplanning theater)
• Handoff (nothing gate-specific; sweep continues)
• Provenance

Notable ledger content worth flagging

The "preplanning theater" incident is documented honestly. Mid-session, I wrote a 287-line forward handoff for a Phase 2 that was executable right then. Operator called it out ("did you actually do any work, or was this all just preplanning?"). Fix was to execute Phase 2 in-session. Encoded in Patterns as the "same-session handoff anti-pattern" (candidate pattern name, not yet canon) with the testable heuristic: if the receiving session is the same agent as the writing session, the handoff is overhead that could be executed work.

Candidate canon principle "cache fetches and parses, not microsecond derivations" has four attestation points now (encoding types, base-prerequisites, gate stemmedTokens precompute, gate BM25 index as negative case). Third deciding-argument recurrence graduates it to canon; most likely site is O-open P7's review of cachedChallengeTypeIndex.

Refs

• feat(gate): governance-driven BM25 + set intersection + envelope (0.20.0) oddkit#118 (feature, merged 260492c)
• chore: promote 0.20.0 to prod oddkit#119 (promotion, merged 1308245)
• odd/gate: canon governance docs for P1.3.2 gate vodka refactor (Phase 1) #120 handoff: P1.3.2 Phase 2 forward handoff #121 odd/gate/transitions: add inflected forms for geminating verbs #122
• Prior ledger: klappy://odd/ledger/2026-04-20-p1-3-1-challenge-canary-landed

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Note

Low Risk
Low risk documentation-only change that adds a new session ledger and updates frontmatter status on existing handoffs; no runtime code or contract changes.

Overview
Adds a new odd/ledger/2026-04-20-p1-3-2-gate-canary-landed.md closeout ledger documenting the P1.3.2 oddkit_gate 0.20.0 canary (what shipped, validation/smoke evidence, and carry-forward O-opens).

Marks the two prior P1.3.2 handoff docs as superseded by updating their frontmatter (status: superseded plus superseded_by), keeping them for historical reference while pointing reviewers to the new ledger.

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