Modernize CC setup for the Claude 5 era: Fable in CI reviews, agents, and settings

[evansenter]

From a 37-agent adversarially-verified staleness audit (31 confirmed findings, 0 refuted outright), plus the two suggestions deferred from #324 and the two follow-up suggestions from #317's approval.

CI / review wiring

• claude-code-review.yml: --model opus → --model fable (most capable GA model; ~2× Opus pricing, bounded per-PR run; fall back to opus if Fable's cyber classifiers ever refuse a security-heavy diff). Adds a concurrency group with cancel-in-progress so rapid pushes stop billing overlapping full-model reviews of stale commits.
• claude.yml: pins --model fable — previously unpinned, so its effective model changed underfoot when Sonnet 5 became the CC default (v2.1.197).
• claude-review.md prompt: the mandated submission flow (cat > file, sed -i, VAR=$(...)) prefix-matched none of the allowed tools, so every review had to improvise around permission denials — rewritten as bare gh pr view + a single gh api --input - heredoc with literal SHA. New repo-agnostic bullet: behavioral-guard PRs need live-validation evidence.
• dotfiles.yml: apt-get update before the zsh install; drop redundant shellcheck/jq installs (preinstalled on ubuntu-latest).

Models

• Agents: audit-* (5), rfc-* (2), improve-workflow → model: fable; status-report stays haiku, summarize-work stays sonnet.
• settings.json: opus[1m] → fable (1M context is Fable's default; the [1m] suffix is auto-stripped). fastMode kept — inert on Fable, active again if the model is ever flipped back to opus. Note: this trades fast mode's 2.5× interactive speed for Fable's quality — one-line revert if unwanted.
• summarize skill → claude-sonnet-5 (5 refs); mcp-builder eval script/docs → claude-sonnet-5.

Stale wiring

• work.md: mcp__github__get_issue → issue_read(method: "get"); pr-review.md: get_pull_request_comments/reviews → pull_request_read(method: ...); Task( → Agent( spawn examples.
• settings.json: drop code-simplifier plugin (redundant with built-in /simplify since v2.1.154).
• bootstrap.sh: GitHub MCP via deprecated @modelcontextprotocol/server-github npx package → official remote HTTP server with ${GITHUB_TOKEN} header expanded by CC at request time.

Docs/skills sync

• hook-authoring skill: trigger list, lifecycle, input-field table, and example refs now cover all registered hooks (was 5 of 10+), pointing at hooks/README.md as source of truth.
• hooks/README.md: enforce-insight step 3 matches the content-aware wait implemented in hooks: content-aware transcript wait in enforce-insight-publish (race fix + test) #316.
• catppuccin (yazi flavor package, bat vendor theme), rust-async (native async fn in traits since Rust 1.75 as the default).

Deferred suggestions folded in

• From Workflow review: adopt loop primitives + recent CC features (Notification hook, /schedule-audits) #324: notification.sh permission padlock matches raw input pre-truncation (+ test); mock-jq truncation coverage boundary documented; vacuous stop_hook_active test now uses real jq.
• From feat(hooks): Stop-hook event-drain for directed events #317: comment pinning the --limit-after---exclude CLI assumption at the drain's bounded consume; multi-event test locking the consume bound to the actual peeked count.

Skipped pending live-payload verification on a real machine

Statusline stdin repo/PR fields + used_percentage, SessionStart sessionTitle — flagged for a local session rather than guessing schemas.

Validation

make check green after rebasing over #322 and #317: 112/112 hook tests, 39/39 bootstrap, shellcheck clean.

Note for the review check: this PR edits claude*.yml, and the claude-code-action requires those files to match main — its check may complain about the workflow-file mismatch; that's the documented action behavior, not a real failure.

Post-merge: ./bootstrap.sh -f locally.

🤖 Generated with Claude Code

https://claude.ai/code/session_01DrBLzQixo3zx8wSHVSGUXS

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