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59 lines
2.6 KiB
Markdown
59 lines
2.6 KiB
Markdown
# pi-extensions
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Personal `pi` coding-agent extensions. This context covers the permission
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extensions that inspect and re-evaluate Bash commands before they are allowed.
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## Language
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### Authority
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**Enforce authority**:
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Allow-only delegation — when the Judge's verdict is `allow` and every gate in
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the Enforce truth table passes, the command runs without the human dialog. The
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Judge can never answer `deny` with authority; every uncertain case (defer,
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deny, preflight, infrastructure failure) falls back to the human dialog.
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_Avoid_: AI takeover, auto-deny, full delegation
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**Audit log (Judge-owned)**:
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The Enforce-era accountability record written by the Judge package itself —
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separate file from the permission-system review log, append + fsync per
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record, self-checked for health; an unhealthy audit log refuses authority.
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_Avoid_: host contract (dropped — see ADR 0006), acknowledged write (upstream
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sense)
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**Irreversibility boundary**:
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An allow verdict requires every operation's effects to be recoverable —
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reversible, or reproducible from the repository or the evidence at hand.
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An operation that destroys data which cannot be re-created or undone
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(unscoped untracked/ignored deletion, discarding uncommitted work,
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rewriting published history) always defers to the human dialog, no matter
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how specifically the user requested it; sensitivity alone (e.g. credential
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refresh) is not irreversibility. Explicit intent grants allow authority
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only over recoverable effects.
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_Avoid_: destructive-but-requested allow (v3 sense — see ADR 0007),
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risk-based deny
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### Wrappers
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**Wrapper**:
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A Bash command of the form `<program> [modifier-args] <inner-command>`, where the
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authorization question is "what does the inner command do?". Whether a wrapper
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may be unwrapped depends on whether its modifier args are transparent.
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_Avoid_: command type, prefix command
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**Transparent wrapper**:
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A wrapper whose modifier args do not change which program the inner command
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resolves to or its trust boundary (e.g. `timeout`). Stripping the modifiers and
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re-evaluating the inner command is sound: the verdict applies to the same
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program that actually runs.
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_Avoid_: safe wrapper
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**Non-transparent wrapper**:
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A wrapper whose modifiers change what the inner command actually does in a way
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the command string does not capture — e.g. `env` (its `PATH=` / `LD_PRELOAD`
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make the inner name resolve to or load a different program) or `xargs` (its
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inner command's arguments are read from stdin). Stripping the modifiers and
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re-evaluating the inner command is unsound: the verdict applies to inputs that
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are not knowable from the command string.
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_Avoid_: unsafe wrapper
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