checkpoint

⚒️ Generated with [Fabro](https://fabro.sh)

stages/004-preflight_lint@1/output.log

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stages/004-preflight_lint@1/script_timing.json

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stages/004-preflight_lint@1/status.json

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+{
+  "outcome": "succeeded",
+  "notes": "Script completed: cargo +nightly-2026-04-14 clippy -q --workspace --all-targets -- -D warnings 2>&1",
+  "failure_reason": null,
+  "timestamp": "2026-07-11T20:47:26.021455859Z"
+}

stages/005-implement@1/prompt.md

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+Goal: # Remove the unused per-run secret registry (`SecretRedactor`) and stale references to it
+
+**Self-contained implementation plan.** Everything needed to implement this is
+in this file plus the repository. Independent — no preconditions; can land
+anytime.
+
+> **Token notation.** Interpolation tokens are written in this file without
+> their enclosing double curly braces, so the file is safe to pass directly as
+> a workflow goal (the goal templater would otherwise try to expand them).
+> Read `env.NAME`, `secrets.NAME` as the double-curly-brace token form used in
+> the codebase.
+
+## Context and goal
+
+Fabro redacts secrets from run output using **content-based** detection:
+entropy analysis plus gitleaks-style credential patterns
+(`fabro_redact::redact_string` / `redact_json_value`), applied where events are
+serialized and where exec-output tails are captured.
+
+A second mechanism was staged but never adopted: `SecretRedactor`, a per-run
+registry of exact secret values, intended to be populated when declared
+secrets resolve at the run boundary and then substituted out of run output
+(catching low-entropy secret values that content-based detection cannot). The
+type landed as infrastructure ahead of its wiring; the wiring PR was
+ultimately **not merged** — the team decided the registration approach was too
+much plumbing for too little benefit over the existing content-based
+redaction, and content-based redaction is now the settled mechanism.
+
+That leaves dead code and two stale forward references on main:
+
+- `SecretRedactor` has **zero consumers** outside its own crate — nothing
+  constructs, registers into, or applies it anywhere in the workspace.
+- A doc comment in `fabro-auth` says provider-header secret resolution sits
+  outside the registry "until exact-match registration is threaded through" —
+  a follow-up that will never happen.
+- The `InterpString` module doc in `fabro-types` says declared-secret values
+  "are intended to be registered into a per-run exact-value redactor" —
+  describing the abandoned design as if it were pending.
+
+**Goal:** delete the dead type and rewrite both stale comments so the code
+describes the real architecture (content-based redaction only). Pure
+deletion/documentation PR — no behavior change.
+
+## Verified current state (as of main `9daca83b3`, 2026-07-09 — re-verify before starting; line numbers are anchors, not gospel)
+
+- `lib/crates/fabro-redact/src/secret_registry.rs` — the whole module
+  (~217 lines: `SecretRedactor` with `register`, `is_empty`, redaction
+  methods, and its unit tests). Uses `crate::Region`, which is **shared** with
+  `entropy.rs` and `gitleaks.rs` and must stay.
+- `lib/crates/fabro-redact/src/lib.rs:11` — `mod secret_registry;` and `:15`
+  `pub use secret_registry::SecretRedactor;`.
+- Workspace-wide grep for `SecretRedactor` outside `fabro-redact` returns
+  nothing (no consumers in `lib/`, `apps/`, or `docs/`). If this grep finds a
+  consumer when you run it, **stop** — the premise of this plan no longer
+  holds; state that instead of deleting.
+- `lib/crates/fabro-auth/src/resolve.rs:479-482` — doc comment on
+  `resolve_extra_headers`:
+  "Provider header secrets resolve outside the run-boundary redactor
+  registration path. Keep this path free of value logging until exact-match
+  registration is threaded through."
+- `lib/crates/fabro-types/src/settings/interp.rs:17-19` — module doc sentence:
+  "Declared-secret values are intended to be registered into a per-run
+  exact-value redactor where secrets resolve; sensitivity is not tracked on
+  resolved strings."
+
+## Implementation
+
+1. **Delete the module**: remove
+   `lib/crates/fabro-redact/src/secret_registry.rs`, the `mod secret_registry;`
+   declaration, and the `pub use secret_registry::SecretRedactor;` re-export
+   from `lib.rs`. Leave `Region`, `redact_string`, `redact_json_value`,
+   `DisplaySafeUrl`, and everything else in the crate untouched.
+2. **Rewrite the `fabro-auth` comment** on `resolve_extra_headers`: keep the
+   operative guidance (never log resolved header values — they may contain
+   secrets), drop the promise of future exact-match registration. Suggested
+   shape: "Resolved header values may contain secrets; keep this path free of
+   value logging. Content-based redaction covers credential-shaped values on
+   output surfaces, but nothing substitutes these exact values."
+3. **Rewrite the `interp.rs` module-doc sentence**: state the real
+   architecture — resolved secret values are plain strings; sensitivity is not
+   tracked on resolved strings; redaction of run output is content-based
+   (entropy + credential patterns), applied where output is serialized. Do not
+   reference a registry or any pending mechanism.
+4. **Sweep for stragglers**: `rg -n "SecretRedactor|secret_registry|exact-match|exact-value" lib/ docs/internal/`
+   — any remaining hit that describes per-run exact-value redaction as
+   existing or planned must be removed or rewritten in this PR. (Expected
+   after steps 1–3: no hits.)
+
+## Scope boundaries — deliberately NOT in this PR
+
+- **Content-based redaction** (`redact_string`, `redact_json_value`, the
+  entropy/gitleaks finders, `Region`) — untouched. This PR removes the unused
+  second mechanism, not the working first one.
+- **Where content-based redaction is applied** (event serialization,
+  exec-output tails, server read paths) — no changes to any application site;
+  this PR does not move, add, or remove redaction passes.
+- **`DisplaySafeUrl` and redacting `Debug` impls** — untouched; unrelated
+  pattern.
+- **The live command-output log path** — has no redaction today; a separate
+  planned change addresses it. Do not touch it here.
+- **`fabro-hooks`** — untouched.
+
+If work outside these boundaries seems genuinely required for this PR to
+compile or pass its tests, stop and state that in the PR description rather
+than expanding scope.
+
+## Tests
+
+- No new tests: the deleted module's tests go with it; no behavior changes to
+  test. Existing `fabro-redact` tests (entropy, gitleaks, jsonl, safe-url)
+  must pass unchanged.
+- `cargo build --workspace` proves no hidden consumer existed.
+
+## Acceptance / verification
+
+- `cargo +nightly-2026-04-14 fmt --check --all`
+- `cargo +nightly-2026-04-14 clippy --workspace --all-targets -- -D warnings`
+- `cargo nextest run --workspace`
+- The sweep in step 4 returns clean.
+- No OpenAPI/wire change; no TypeScript client regeneration.
+
+## Conventions
+
+- Plain-English commit messages, PR text, and comments — describe what the
+  change does; no internal planning identifiers or plan-file names in
+  anything that ships.
+- PR description must state plainly: the exact-value registry approach was
+  abandoned in favor of the existing content-based redaction; the type was
+  never wired to any consumer; the two rewritten comments previously promised
+  the abandoned mechanism. Known limitation to state honestly: low-entropy
+  declared secret values (e.g. a secret whose value is an ordinary word) are
+  not caught by content-based detection — this is an accepted trade, not a
+  regression introduced here.
+
+
+## Completed stages
+- **toolchain**: succeeded
+  - Script: `command -v cargo >/dev/null || { curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y && sudo ln -sf $HOME/.cargo/bin/* /usr/local/bin/; }; cargo --version 2>&1`
+  - Output:
+    ```
+    cargo 1.95.0 (f2d3ce0bd 2026-03-21)
+    ```
+- **preflight_compile**: succeeded
+  - Script: `cargo check -q --workspace 2>&1`
+  - Output: (empty)
+- **preflight_lint**: succeeded
+  - Script: `cargo +nightly-2026-04-14 clippy -q --workspace --all-targets -- -D warnings 2>&1`
+  - Output: (empty)
+
+
+Read the plan file referenced in the goal and implement every step. Make all the code changes described in the plan. Use red/green TDD. Be sure to use the rust-style-guide skill to help you follow this repo's Rust style conventions.

stages/005-implement@1/provider_used.json

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+{
+  "mode": "agent",
+  "provider": "openai",
+  "model": "gpt-5.5",
+  "reasoning_effort": "xhigh"
+}