Slice 3: the PR flow

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-24 12:37:54 -07:00
parent 33d9d7a482
commit a2bf89e90b
15 changed files with 2928 additions and 141 deletions
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+-- Slice 3 / §10: the PR flow per §10 in full.
+--
+-- The cache shape from 002_cache.sql already carries cached_prs for
+-- rfc_branch kind. Slice 3 needs two additions on top: a column to
+-- record the resolution PR that supersedes an original under §10.9,
+-- and a column to record the merge commit on no-fast-forward merges
+-- per §10.5 so the PR page can render against the right ancestry.
+--
+-- The pr_seen cursor in 005 already covers §10.3 — last_seen_commit_sha
+-- accents new hunks, last_seen_message_id accents new conversation
+-- messages (review-kind threads on the branch are thread_messages too).
+
+ALTER TABLE cached_prs ADD COLUMN superseded_by_pr_number INTEGER;
+ALTER TABLE cached_prs ADD COLUMN merge_commit_sha TEXT;
+
+CREATE INDEX idx_cached_prs_superseded ON cached_prs (superseded_by_pr_number);
+
+-- §10.9: when a resolution branch is cut from main's tip, we record the
+-- original branch it replays so the audit log and the PR header can
+-- carry the relationship. The original PR auto-closes on the resolution
+-- PR's merge via the cache reconciler reading the trailer on the merge
+-- commit.
+CREATE TABLE pr_resolution_branches (
+    id                  INTEGER PRIMARY KEY AUTOINCREMENT,
+    rfc_slug            TEXT NOT NULL,
+    original_pr_number  INTEGER NOT NULL,
+    original_branch     TEXT NOT NULL,
+    resolution_branch   TEXT NOT NULL,
+    created_at          TEXT NOT NULL DEFAULT (datetime('now')),
+    UNIQUE (rfc_slug, resolution_branch)
+);
+
+CREATE INDEX idx_pr_resolution_original ON pr_resolution_branches (rfc_slug, original_pr_number);