[luisleo526]

What

Adds the ## 1.8.0 — 2026-10-27 section (with migration notes) to CHANGELOG.md, above ## 1.7.0. CHANGELOG.md is the only file changed (+131/-0). Documentation only: no src/, include/, docker/, scripts/, tests/ or workflow file is touched.

Why

The engine release body is generated from git-log subjects only and carries no migration notes; the release notes users read are this file (and the GitHub release body edited from it after publish). The notes must be on main before the release dispatch.

Content

• Compatibility and migration: exact pairing with codegen 1.8.0, regenerate C++ and relink every strategy library, no public header change, the new codegen color input type, the changed harness file docker/run_json.py.
• Faster run_json report handling (run_json: cut the wrapper's report-sink passes from ~11 to 3 (part of S-272) #517) with the measured table against 1.6.3 and 1.7.0 and the statement that the gap to 1.6.3 is not closed.
• Scratch placement restated (docs: scratch placement and its refusals in one place (1.7.0 and later) #518); the unused storage building block (engine: fixed-shape O(1) store for Pine collections (A5-STORE) #515; its allocation-gate sites are unreviewed, no bound claimed); a known limit (memory with never-filled pending orders, "a fix is planned for a later release").
• CI and release process: every merged change since 1.7.0 not listed above (ci: release ruleset probe lists every branch ruleset (measurement only, gate unchanged) [replaces #489] #505-docs: backfill release notes for engine releases (CR-315) #510, docs(AGENTS): CI runner routing after the split (companion to #512) #513, ci: light secret-free jobs to GitHub-hosted runners (owner R309/R312) #514, test_check_doc_reverts: do not inherit the caller's PINEFORGE_DOC_REVERT_BASE #516, test: compare borrowed fd flags without Darwin's written bit (Part of CR-352) #519, ci: dispatch-only post-runner capability canary (fleet-post-capability.yml) #520, tests: run the pytest row test_run_json_stream_fastpath in the full profiles, not 'fast' #522, ci: CR-150/C4 source allocation-bound gate over the engine and generated C++ (scoped site identities, fail-closed bounded admission) #469, ci(live): run corpus equivalence as a required CTest row (CR-223-ROW) #481, tests: drop the TIMEOUT 180 ctest property (owner's no-time-limit rule, P2-CM-F4) #504). Every line is taken from the merged commit body; none claims a behaviour change for a tests-only or CI-only change.

Not in this commit (not on main at base 641349a): the release gate, tmpwatch and the TvJO fix. Each gets one line from its merged PR body as a follow-up commit on this branch before this PR merges; this PR is meant to merge after those three.

Checks

• Route: docs-only, lab verify --via ci-only (no sweep).
• Read as a committed diff by an independent reviewer: GO. All 18 engine commits v1.7.0..641349a have a bullet, none extra.
• Numbers: the run_json: cut the wrapper's report-sink passes from ~11 to 3 (part of S-272) #517 timings and RSS are the measurements in the run_json: cut the wrapper's report-sink passes from ~11 to 3 (part of S-272) #517 body; the ratios in the text were recomputed (1.77/0.36 = 4.9, 8.26/1.35 = 6.1, 8.94/5.39 = 1.66; 4.61/0.36 = 12.8, 22.31/1.35 = 16.5, 22.99/5.39 = 4.27).
• The heading date 2026-10-27 is the planned tag date and is corrected before the tag if the date moves.

🤖 Generated with Claude Code