Add Pi review-runner adapter

[dipree]

Summary

Adds Pi as a first-class entire review worker by implementing its AgentReviewer adapter. This is the concrete proof that the previous "only claude-code/codex/gemini" limit was just missing adapters, not a launch-capability wall.

Stacked on #1312 (review profiles). Review/merge that first.

What changed

• cmd/entire/cli/agent/pi/reviewer.go — NewReviewer() returning a ReviewerTemplate:
  • BuildCmd: pi --mode json --print [--model <model>] <prompt> with ENTIRE_REVIEW_* env via AppendReviewEnv
  • Parser: maps Pi's --mode json AgentSessionEvent stream (message_update text deltas, tool_execution_start, message_end/turn_end usage, agent_end) into Entire's review Event stream. Falls back to message_end content text when no deltas streamed; uses stopReason for success.
• cmd/entire/cli/agent/pi/generate.go — GenerateText so Pi can also serve as a master / summary provider.
• Wiring: launchableReviewerFor returns pi.NewReviewer(); Pi added to summary provider binaries, default-profile agents, master-preference order, and config/help text.
• Session matching: Pi runs are matched to their lifecycle sessions by model too (same-agent/different-model workers resolve correctly); agent_end backfills the model via ExtractModel.

Testing

• reviewer_test.go: name, argv/env shape with --model, JSON event-stream parsing, message-end fallback text
• manifest test for same-agent/different-model disambiguation
• go vet ./cmd/entire/cli/agent/pi/...
• env -u PI_CODING_AGENT go test ./cmd/entire/cli/...
• targeted review integration tests

---

Note

Medium Risk
Touches review orchestration, manifest session matching, and summary provider selection; behavior is well covered by unit tests but depends on Pi CLI JSON event stability.

Overview
Pi is wired into entire review as a first-class worker alongside Claude Code, Codex, and Gemini, using the shared ReviewerTemplate pattern instead of marker fallback.

A new pi review adapter runs pi --mode json --print [--model …] <prompt> with ENTIRE_REVIEW_* env, and maps Pi’s NDJSON session stream (text deltas, tools, usage, stopReason, agent_end) into Entire review events, including fallback text from message_end when no deltas streamed. GenerateText (pi --print --no-tools --no-session) lets Pi act as a review master and checkpoint summary provider.

Integration: launchableReviewerFor returns pi.NewReviewer(); Pi is added to summary-provider binaries, default profile agents (prompt-driven like Gemini), master preference order, and user-facing configure/help text. On agent_end, TurnEnd now sets Model from the captured session transcript via ExtractModel.

Manifest matching uses tighter model ID normalization (strip provider prefix / tier suffix) so multiple Pi workers with different models map to the correct lifecycle sessions; tests cover argv/env, JSON parsing, and same-agent/model disambiguation.

^{Reviewed by Cursor Bugbot for commit 27f6781. Configure here.}

[Copilot]

Pull request overview

Adds Pi as a first-class entire review worker by wiring a new AgentReviewer adapter that runs pi --mode json --print and maps Pi's NDJSON AgentSessionEvent stream into Entire review events. Pi is also added as a summary/text-generation provider and to the default profile / master preference order, and review-run model matching is tightened so multiple Pi workers using different models map to the correct lifecycle sessions.

Changes:

• New agent/pi/reviewer.go (+ tests) implementing ReviewerTemplate for Pi, and new agent/pi/generate.go so Pi can serve as a summary/master provider.
• review_bridge.launchableReviewerFor returns pi.NewReviewer(); Pi added to summary provider binaries, default profile workers, master preference order, and user-facing help/error text.
• review/manifest.go normalizes model IDs (strips provider prefix and tier suffix) for same-agent/different-model session matching; pi/lifecycle.go backfills Model on TurnEnd via ExtractModel.

Reviewed changes

Copilot reviewed 16 out of 16 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
cmd/entire/cli/agent/pi/reviewer.go	New Pi review adapter: builds argv/env and parses Pi's JSON event stream into review events.
cmd/entire/cli/agent/pi/reviewer_test.go	Unit tests for adapter name, argv/env shape, JSON event parsing, and message-end fallback text.
cmd/entire/cli/agent/pi/generate.go	Implements GenerateText so Pi can act as a master / summary provider.
cmd/entire/cli/agent/pi/lifecycle.go	Populates Model on TurnEnd by extracting from the captured Pi session transcript.
cmd/entire/cli/agent/text_generator_cli.go	Registers Pi binary (pi) as a summary-capable provider.
cmd/entire/cli/review_bridge.go	Wires pi.NewReviewer() into launchableReviewerFor.
cmd/entire/cli/review/manifest.go	Tighter model-ID normalization (strip provider prefix / tier suffix) for session matching.
cmd/entire/cli/review/manifest_test.go	Adds disambiguation test for same-agent/different-model worker → session mapping.
cmd/entire/cli/review/profile.go	Adds Pi to default profile agents and master preference order; updates error messaging.
cmd/entire/cli/review/picker.go	Updates guided-setup error message to mention Pi.
cmd/entire/cli/review/cmd.go	Doc-comment update listing Pi among adapter-backed agents.
cmd/entire/cli/review/types/template.go	Doc-comment update listing Pi as a template user.
cmd/entire/cli/explain_summary_provider.go	Adds Pi to the "no summary-capable provider" error guidance.
cmd/entire/cli/settings/settings.go	Doc comment lists Pi as a valid summary provider.
cmd/entire/cli/setup.go	--summarize-agent help text mentions Pi.
docs/architecture/review-command.md	Documents Pi as a prompt/model-driven worker in profiles and adapter list.

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[dipree]

Addressed the Cursor Bugbot finding and rebased onto the updated #1312.

• Model tier suffix dropped in matching (manifest.go): the model matcher now lives on the base PR and strips the provider prefix + thinking-level suffix. Since a session's recorded model name never carries the thinking-level suffix, two pi workers that differ only by :high vs :low genuinely share the same session model id — so disambiguation falls back to start-time + the used-session set in matchReviewSessionState, which still links each worker to a distinct session (no omission). This is documented on compactReviewModelID.

Also fixed the lint findings in reviewer_test.go (unchecked type assertions → comma-ok). golangci-lint run ./cmd/entire/cli/agent/pi/... ./cmd/entire/cli/review/... is clean and the Pi adapter tests pass.

Note: the earlier test-core red was a flaky temp-dir cleanup in TestAttach_SessionAlreadyTracked_NoCheckpoint (unlinkat .git/objects: directory not empty), unrelated to this change.