bash-policy

name	bash-policy
description	Generate and curate Claude-oriented bash-policy project rules. Use to run bash-policy export/report, review .bash-policy-candidates.yaml from Claude settings, update .bash-policy.yaml, normalize command-shape identities, or validate bash-policy configuration.

Bash Policy

Core Workflow

1. Find the repo root and inspect current policy state.

   • Use git status --short -- .bash-policy.yaml .bash-policy-candidates.yaml before edits.
   • Treat .bash-policy.yaml as curated source of truth; .bash-policy-candidates.yaml is generated evidence.
   • Keep policy-artifact-root distinct from safe-root: the artifact root is the durable project root where .bash-policy.yaml, dry-run logs, and candidates live; the safe root is the active checkout/worktree used for path validation.
   • For interactive curation, use an absolute --policy-artifact-root. Do not rely on hook cwd or an auxiliary worktree root.

2. Generate or refresh Claude candidates.

   • Bash-policy curation is mostly for Claude permission telemetry.

   • Use this exact export shape by default:

     bash-policy export --provider claude --policy-artifact-root "$repo_root" --claude-settings .claude/settings.json
     

   • If .claude/settings.json is missing, ask or locate the intended Claude settings file before guessing.

   • bash-policy export regenerates .bash-policy-candidates.yaml from current sources; previous candidate-file contents are not policy state.

   • Export sources are aggregated dry-run evidence and optional Claude settings. Claude settings contribute Bash(...) permission-family candidates; dry-run evidence contributes command-shape candidates.

   • Use bash-policy report --provider claude --policy-artifact-root "$repo_root" when frequency, proposed status, or examples from .bash-policy-dry-run.jsonl would improve curation.

   • Generated evidence artifacts are not intended policy deliverables: .bash-policy-candidates.yaml, .bash-policy-dry-run.jsonl, .bash-policy-dry-run.jsonl.lock, and .bash-policy-dry-run.jsonl.lock.owner.json should be ignored or worktree-excluded.

3. Curate command-shape candidates.

   • Add runtime command-shape rules only for safe, read-only inspection commands.
   • A command-shape rule may use decision: allow, decision: deny, or decision: manual.
   • Configured command-shape rules override built-in defaults, but never override the non-overridable safety floor: secret exposure, credential paths, safe-root escape, verified bypasses, unsupported redirections, dynamic shell forms, and destructive irreversible operations must not become auto-allowed.
   • Prefer a built-in profile over a custom rule when the current evaluator already allows a representative command. Export should omit built-in-covered shapes; if a candidate appears anyway, behavior-check before adding a redundant rule.
   • Prefer normalized placeholders:
     • <safe-path> for a single normalized safe path.
     • <safe-path>... for one or more final path operands.
     • <pattern> for non-sensitive search patterns.
     • <number> and <fields> for numeric and field-list values.
     • <safe-glob> for constrained non-sensitive filename globs such as *.go in supported option-value positions.
     • <safe-pathspec> when the engine emits pathspec-shaped operands.
   • Generalize command shapes whenever the broader rule is still safe. Replace specific single-path or literal-value rules with placeholder or terminal-variadic forms, then remove narrower rules covered by the general rule.
   • Do not copy highly specific literals such as project regexes, command names, timestamps, local absolute paths, or generated line ranges when a placeholder rule captures the intent.
   • Do not keep literal glob tokens such as *.go or *.py in command-shape identities. For git pathspec operands, including git grep ... -- *.go and git diff ... -- *.go, expect current bash-policy to normalize safe extension globs to <safe-path> and cover repeated operands with <safe-path>....
   • For grep filename filters, use --include=<safe-glob> only when current validation/evaluation supports it. Do not rewrite include globs as --include=<pattern>; if <safe-glob> is unsupported in the installed binary, omit the rule and leave that command manual.
   • For sed read-range forms, prefer normalized rules such as over literal line ranges and filenames when current evaluation emits that shape. Do not add sed rules for , , , , , or forms; those can execute commands, read scripts, or write files and must remain manual.

4. Curate permission-family candidates.

   • In .bash-policy.yaml, permission-family entries are export bookkeeping only:

     - kind: permission-family
       identity: Bash(grep:*)
       status: resolved
     

   • They suppress already-reviewed Claude Bash(...) families in future candidate exports; they do not authorize runtime commands by themselves.

   • Distinguish this from Claude settings: user-global or repo-local permissions.deny entries can act as runtime deny inputs, and admissible permissions.allow entries can act as runtime allow inputs after the safety floor and concrete command-shape checks pass. Repo-local settings prevail over exact normalized conflicts with user-global settings.

   • Bash(...:*) identities legitimately contain *; do not treat that as a glob command-shape problem.

   • Narrow command-shape rules do not resolve a broad permission-family candidate. For example, Bash(gh:*) remains unresolved until .bash-policy.yaml records permission-family Bash(gh:*) as resolved.

   • Read-only permission families already covered by built-in profiles should be omitted from unresolved candidates; unresolved non-built-in families should be resolved only after review, not promoted wholesale.

   • Recoverable rtk-wrapped Claude permission families should normalize to the inner family before comparing built-in coverage or adding a resolution.

5. Validate and behavior-check.

   • Always run:

     bash-policy validate --policy-artifact-root "$repo_root"
     

   • Check for accidental glob command-shapes:

     rg -n 'identity: .*\*\.' .bash-policy.yaml
     

     No runtime command-shape identity should match. Permission-family Bash(...:*) entries are fine.

   • For non-trivial normalization, evaluate representative commands:

     printf '%s' '{"command":"git grep -n foo -- internal/file.go"}' |
       bash-policy evaluate --provider claude --mode on \
       --policy-artifact-root "$repo_root" --safe-root "$repo_root"
     

   • Confirm expected allow/manual behavior from actual output, not from the rule text alone.

   • Re-run export after curation when useful; accepted command-shape rules and resolved permission families should disappear from .bash-policy-candidates.yaml.

   • If activation or init is part of the task, preserve existing on, dry-run, or off activation and ensure generated provider hook commands pass explicit --policy-artifact-root and --safe-root values.

6. Report clearly.

   • State how candidates were generated, which sources were merged, what was intentionally omitted, and validation results.
   • Mention whether .bash-policy.yaml is staged, unstaged, or both, without changing staging unless requested.

CLI Reference

• bash-policy export --provider claude --policy-artifact-root "$repo_root" --claude-settings .claude/settings.json Regenerate .bash-policy-candidates.yaml from dry-run evidence and Claude settings. Use this as the default candidate-generation command for Claude-oriented curation.

• bash-policy report --provider claude --policy-artifact-root "$repo_root" Summarize .bash-policy-dry-run.jsonl with counts, proposed statuses, and examples. Use before curation when frequency or examples matter.

• bash-policy validate --policy-artifact-root "$repo_root" Validate .bash-policy.yaml schema and rule identities. Run after every edit.

• bash-policy evaluate --provider claude --mode on --policy-artifact-root "$repo_root" --safe-root "$repo_root" Evaluate one hook payload from stdin. Use with printf '%s' '{"command":"..."}' | ... for behavior checks.

• bash-policy init --provider claude --policy-artifact-root "$repo_root" Install or repair Claude hook configuration. Preserve existing activation state; do not run during policy curation unless hook setup is explicitly in scope.

• bash-policy activation on|dry-run|off --provider claude --policy-artifact-root "$repo_root" Change Claude hook activation. dry-run logs redacted telemetry without changing provider behavior; on may emit provider decisions. Do not change activation unless explicitly requested.

• bash-policy codex-readiness [--json] Check Codex readiness when Codex integration is in scope. For this skill, Codex is secondary; Claude candidate export is the default path.