spec-spine: Hook for Claude Code

{
  "PostToolUse": [
    {
      "matcher": "Edit|Write",
      "hooks": [
        {
          "type": "command",
          "command": "command -v jq >/dev/null 2>&1 || { echo '[hook] jq missing, staleness check skipped'; exit 0; }\nfp=$(jq -r '.tool_input.file_path // empty' 2>/dev/null)\n[ -n \"$fp\" ] || exit 0\n# The repo containing the edited file, not the session's project: an edit in a\n# sibling checkout must not recompile this one.\nroot=$(git -C \"$(dirname \"$fp\")\" rev-parse --show-toplevel 2>/dev/null) || exit 0\n[ -d \"$root/specs\" ] || exit 0\n# Resolve the spec-spine binary for the repository this hook acts on:\n# $SPEC_SPINE_BIN, then that repository's own release build, then PATH. A repo\n# that builds its own binary must be governed by the one it builds; the PATH\n# fallback keeps an adopter on the published CLI working (spec 051).\nspec_spine_bin() {\n  if [ -n \"${SPEC_SPINE_BIN:-}\" ] && [ -x \"${SPEC_SPINE_BIN}\" ]; then echo \"${SPEC_SPINE_BIN}\"; return 0; fi\n  if [ -x \"$1/target/release/spec-spine\" ]; then echo \"$1/target/release/spec-spine\"; return 0; fi\n  command -v spec-spine 2>/dev/null\n}\nsc=$(spec_spine_bin \"$root\") || sc=''\n[ -n \"$sc\" ] || { echo '[hook] spec-spine absent, staleness check skipped (run /setup)'; exit 0; }\ncase \"$fp\" in\n  */specs/*/spec.md)\n    # The one sanctioned write in these hooks: the session is live and can\n    # commit the recompiled shards with the spec edit that made them stale.\n    \"$sc\" --repo \"$root\" compile >/dev/null 2>&1 \\\n      && echo '[spec-registry] recompiled after spec edit' \\\n      || echo '[spec-registry] compile FAILED after spec edit, run spec-spine compile' ;;\nesac\ncase \"$fp\" in\n  */specs/*/spec.md|*/spec-spine.toml|*/.claude/settings.json|*/.mcp.json|*/.claude/agents/*.md|*/.claude/rules/*.md|*/.claude/skills/*/*.md|*/.github/workflows/*.yml|*/standards/*|*/AGENTS.md|*/CLAUDE.md|*/Makefile|*/docs/design/*)\n    \"$sc\" --repo \"$root\" index check 2>&1 | tai