0.3.0: release-history lessons, notes/record lint, gate G13/G14, install-backup fix

[JesseRaber]

Release PR for github-release 0.3.0 (minor bump from 0.2.1: new gate checks, new lints, new helper, changed helper output — per the new bump table).

Not tagged, not drafted, not published. Tag, draft, publish, branch delete and settings are separate owner steps.

Commits

• 0b28f68 Install: backups can never shadow a new install — R-066, imported unchanged from the tested bundle (fast-forward, not re-implemented)
• 4129f17 0.3.0 changes for R-017, R-042..R-048, R-051..R-065
• ce34766 tests: keep Python 3.8 support

Internal references (project tracker rows)

Row	Where
R-051, R-060	check_versions.py notes lint (FAIL status wording/placeholders/empty bullets/pre-written dates; WARN UUIDs and tracker IDs; HTML comments ignored); RELEASE_NOTES_TEMPLATE.md; release.yml step runs it before the draft
R-052	verify_release.py author + title; publish.md Never: hand-created releases
R-053	release-gate §2 git identity, G1 author check; repo-setup; NEXT_AGENT_RELEASE_PROMPT
R-054	publish.md flow; gate G1c
R-055	publish.md approval block Immutable releases: ON/OFF; verify-and-record
R-056	publish.md §2 refusal table (merge, branch delete; proxy/API + safety-classifier sources; "expected: refused"); one combined owner command block
R-057	gate G13; verify-and-record trial-counts rule
R-058	release-gate §2 exit code on its own line; blocked = not-run, cite CI job; G5
R-059	publish.md §3 recipe asserts count; verify_release.py prints "downloaded N of M" first
R-061	publish.md §5 append-only Known issues; verify_release.py --notes
R-062	release-gate §2 push-or-bundle, --no-optional-locks, re-hash after bridge writes; web-UI uploads under blob check; G14 + check_versions.py --drift-against
R-063	check_versions.py record encoding lint (BOM/NUL/CRLF/repeated install-log header), runs in CI; verify-and-record "Append safely"
R-064	gate G0 marker; publish.md §5 removal; prompt template field
R-065	release-gate §1 bump table; gate report "Bump:" line
R-042..R-045	host-matrix (Gemini chat vs Spark; channels + load paths); check prompt T3/T4
R-046, R-048	verify-and-record (marketplace source load path, no mtime; verbatim evidence files)
R-047	ci.yml triggers release/**, v*, workflow_dispatch
R-017	checkout v7.0.1, setup-python v7.0.0, upload-artifact v7.0.2, download-artifact v8.0.2 — SHA-pinned with tag comments

Also: HOST_INSTALL_LOG.md gains an appended "From 0.3.0" table with the Host load column (old rows untouched); CHANGELOG headings for 0.1.0–0.2.1 drop the stale "(draft, not released)" wording.

Evidence

• Tests: tests exit=0 (37 run) on Python 3.11 and 3.8 locally; CI run 38014619948 green (ubuntu 3.11, ubuntu-22.04 3.8, windows 3.11, validate, same-bytes).
• check_versions.py --version 0.3.0 --previous 0.2.1 --workflow ... --drift-against skills/github-release → PASS, 0 stale copies.
• Local candidate SHA256SUMS sha256 0fb112505d0c.

🤖 Generated with Claude Code

https://claude.ai/code/session_01ASkrNtB42EVR8TGPqDtHgJ