bound reply chains in list output to 3 most recent

[0xgleb]

Motivation

Issue #30: task-list responses expand long historical reply chains alongside current work, obscuring actionable state and consuming excessive tokens. The active-first ordering from #67 bounded completed todos but reply chains were still unbounded.

Solution

formatTodoList bounds each todo's reply chain to the 3 most recent replies with a count-prefixed omission indicator. Full history remains in durable state and is retrievable through explicit todo queries.

Validation

RED observed (test expected reply 12/11/10 visible and reply 9 absent with '9 earlier replies omitted'; failed against unbounded rendering). GREEN after: todo suite 59/59.

Summary by CodeRabbit

• New Features
  • Todo entries now display the three most recent replies, with a note indicating how many earlier replies were omitted. Entries without replies remain unchanged.

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ℹ️ Recent review info

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• Configuration used: Organization UI
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• Plan: Advanced
• Run ID: 62bb8a84-a738-43ba-ab99-88503afc0574

📥 Commits

Reviewing files that changed from the base of the PR and between 4b6d2de and b8b99bf.

📒 Files selected for processing (2)

• pi/extensions/todo/state.test.ts
• pi/extensions/todo/state.ts

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📜 Recent review details

⏰ Context from checks skipped due to timeout. (4)

• GitHub Check: fj (x86_64-darwin)
• GitHub Check: fj (aarch64-darwin)
• GitHub Check: fj (x86_64-linux)
• GitHub Check: fj (aarch64-linux)

🔇 Additional comments (2)

pi/extensions/todo/state.test.ts (1)

411-425: LGTM!

pi/extensions/todo/state.ts (1)

585-586: 🎯 Functional Correctness

The reply-ordering contract remains unresolved.

transitionTodoState appends replies, but the available evidence does not establish whether effect@3.22.2 preserves their order when decodeTodoState decodes persisted state. The decoder implementation could not be inspected, so whether slice(-REPLY_HISTORY_LIMIT) selects the newest replies after decoding is undecidable.

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Walkthrough

formatTodoList now displays up to three recent replies per todo. When earlier replies exist, the output includes their count. A test checks the output for a todo with 12 replies.

Changes

Todo reply display

Layer / File(s)	Summary
Limit displayed replies pi/extensions/todo/state.ts, pi/extensions/todo/state.test.ts	formatTodoList displays the latest three replies and reports how many earlier replies it omitted. A test checks that 12 replies produce three displayed replies and an omission count of 9.

Priority: ⬇️ Low

Change: Bug fix

Merge Risk: ⚪ Minimal · up to b8b99

Todo lists show the three most recent replies and indicate how many earlier replies are omitted. No merge-blocking risk is evident.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly describes the main change: limit list output to the three most recent replies.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 2…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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