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…2026-04-29) Amara's substantial math packet anchoring the shard transport landed as a research note under docs/research/. Bounded shape: - Core claim: shard files = write model / event store; tables = read model / projection; DBSP/Z-set = correction algebra - Carrier types + write/read model decomposition - Seven laws to test (commutativity, idempotency, retraction, supersession, projection-rebuild equivalence, write-read separation, chronology) - Retraction model with two implementation options - Anti-hotspot law (formal reason Option B works) - F# implementation sketch for future projector script - §33 archive header with non-fusion disclaimer (this note does NOT claim implementation IS DBSP; it claims the math is isomorphic enough that the laws should hold) Operator-authority criterion applied (4 conditions all hold): prior review converged + failure mode live + action reversible + more review = flywheel turn. Authorized landing. Glossary entry "Git-native CQRS / Event Sourcing" DEFERRED because it depends on PR #723 (Candidate-count Goodhart entry) merging first to avoid overlapping diff regions. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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Pull request overview
Adds a research-grade math note that frames tick-history shard files as a CQRS/Event-Sourcing write model with DBSP/Z-set delta algebra, and records the landing via a new per-tick shard entry.
Changes:
- Add
docs/research/tick-history-shards-as-dbsp-event-store.mdformalizing the shard transport in DBSP/Z-set terms and specifying seven laws to test. - Add a new tick-history shard file
docs/hygiene-history/ticks/2026/04/29/0335Z.mdcapturing the tick’s durable log row for this research landing.
Reviewed changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.
| File | Description |
|---|---|
| docs/research/tick-history-shards-as-dbsp-event-store.md | Research note formalizing shard transport as an event store/projection pipeline with DBSP/Z-set laws. |
| docs/hygiene-history/ticks/2026/04/29/0335Z.md | New per-tick shard row documenting the landing of the research note. |
…on drift Three threads from Codex P2 + Copilot P1 (2 distinct findings): 1. **Filename convention drift** (lines 56 + 188): the research note recommended `HHMMSSZ-<short-content-hash>.md` but the currently landed convention is `HHMMZ.md`. Reframed as "future-migration recommended path (NOT the current landed convention)" with explicit pointer to the README's actual current convention. Math below uses content-hash form because it makes idempotency law cleanest to state, but operational form is HHMMZ.md. 2. **Shard schema mismatch** (line 1 of 0335Z.md): the row started with parenthetical narrative inside the timestamp cell, which doesn't match the README's strict 6-column schema (`| <ISO 8601 timestamp> | <model id> | <cron> | <body> | <PR ref> | <observation> |`). Fixed: timestamp cell now contains only the ISO 8601 timestamp; narrative moved to the body cell. Aaron's diagnostic catch was load-bearing: BLOCKED was caused by unresolved threads (= conversation-resolution requirement in branch protection), NOT Aaron-side approval. I had misdiagnosed `reviewDecision=NONE` as "human review required"; the actual blocker was these 4 unresolved threads. Stopped making new shard PRs while diagnosing. The pithy diagnosis (Amara): "BLOCKED is a state, not a cause." Resolved into actual causes; fixing now. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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research/tick-history-shards-as-dbsp-event-store-amara-2026-04-29
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Amara's math packet landed as bounded research note. Operator-authority criterion applied (4 conditions hold). Seven laws to test specified for future projector implementation. Glossary entry deferred (PR #723 dependency).