fix(pi-fff): resolve startup config before tool registration - #793
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ChangesStartup mode and tool registration
Estimated code review effort: 4 (Complex) | ~45 minutes Merge Risk: ⚪ Minimal · up to The startup configuration behavior is updated with no actionable merge-blocking risk remaining; the PR is merge-ready after normal checks and review. Sequence Diagram(s)sequenceDiagram
participant Pi
participant pi_fff
participant sessionManager
participant FinderFactories
Pi->>pi_fff: emit session_start
pi_fff->>pi_fff: resolve startup configuration
pi_fff->>sessionManager: read persisted mode
sessionManager-->>pi_fff: return saved mode
pi_fff->>FinderFactories: initialize finders
pi_fff->>Pi: register mode-specific tools
Pi->>Pi: activate registered tool names
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Possibly related PRs
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
✨ Finishing Touches🧪 Generate unit tests (beta)
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Inline comments:
In `@packages/pi-fff/README.md`:
- Around line 127-133: Update the “Startup mode precedence” documentation to
explicitly state that a mode persisted by /fff-mode and restored during session
resume overrides the CLI, environment, global config, and default resolution;
preserve the existing note about /reload behavior.
In `@packages/pi-fff/src/index.ts`:
- Around line 345-348: Update resolveStartupConfig so the fff-mode value is
validated against VALID_MODES before calling setMode; invalid flag or
environment values must be rejected and resolution must fall through to the next
lower-precedence value, preserving only supported FffMode values in state.
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Fix all unresolved CodeRabbit comments on this PR:
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packages/pi-fff/README.mdpackages/pi-fff/src/index.tspackages/pi-fff/test/extension.test.ts
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| pi.registerTool({ | ||
| name: toolNames.grep, | ||
| label: toolNames.grep, | ||
| queueTool("grep", { |
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We should use toolNames.grep here
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Updated in 039a8ea. The lazy getter references toolNames.grep directly while keeping name resolution deferred until startup state is available.
| pi.registerTool({ | ||
| name: toolNames.find, | ||
| label: toolNames.find, | ||
| queueTool("find", { |
| pi.registerTool({ | ||
| name: toolNames.multiGrep, | ||
| label: toolNames.multiGrep, | ||
| queueTool("multiGrep", { |
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@gustav-fff also you review and test out this PR |
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[triage-bot] DIRECTED: Reviewed and tested. Logic is sound, tests green. One real biome violation on the changed file — CI won't catch it (no biome step in Tested (branch checked out locally):
-import { Type, type TSchema } from "@sinclair/typebox";
+import { type TSchema, Type } from "@sinclair/typebox";
@@ resolveStartupConfig() @@
- setMode(
- getConfigValue(
- "fff-mode",
- "PI_FFF_MODE",
- config.mode,
- "tools-and-ui",
- parseMode,
- ),
- );
+ setMode(
+ getConfigValue("fff-mode", "PI_FFF_MODE", config.mode, "tools-and-ui", parseMode),
+ );Fork PR, cannot push — apply the diff above ( Logic: startup ordering, Honk-Honk 🪿 |
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@gustav-fff make a separate PR with changing biome to oxc formatter and linter project wise and make sure that the they are correctly wired to the CI (only for packages/ folder) |
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[triage-bot] DIRECTED: Done — #796.
CI green on #796: Verified failure path too: misformatted temp Two files reformatted, 13 lines: Honk-Honk 🪿 |
Summary
Pi applies extension flag values after the extension factory returns, while saved
fff-modeentries become available insession_start. Resolve both there, then initialize the finders and register the tools with their final names. SDK sessions that do not bindsession_startuse the same one-time preparation before their first agent turn.A
/fff-modechange between prefixed and override tools is now saved but remains pending until/reload. Changes betweentools-and-uiandtools-onlystill apply immediately. This keeps the reported mode, active tool names, and prompt guidelines in sync.The tests now model Pi's flag lifecycle and cover startup precedence, invalid mode fallback, saved-mode restoration, dynamic registration, active-tool preservation, the SDK fallback, and the reload boundary.
Validation
bun test packages/pi-fff/test(76 tests)bun run typecheckpi --mode rpcchecks for CLI override, invalid-mode fallback, and persisted override after reloadcreateAgentSession()check confirming the tools are active before its first agent turnFixes #792.
Summary by CodeRabbit
New Features
/reloadis required after switching to or fromoverride.Documentation
/fff-modeguidance to cover mode precedence, session restoration, and reload requirements.