docs: refresh STATUS.md — Agent Inbox API loop complete

[zaridan]

Store + send + the native agent-inbox API (reads/writes, HT-17/HT-18) are all merged. Refreshes STATUS.md: the full loop is now behind an HTTP API, and Next points at the first real EmailSender adapter (Gmail), a deploy, and HT-16. Drops the stale conversations-v1.md reference. Docs-only.

🤖 Generated with Claude Code

Summary by CodeRabbit

• Documentation
  • Updated project status to reflect an end-to-end mail engine exposed via a native HTTP Agent Inbox API.
  • Documented inbound reply handling (parse/thread/store) and Agent inbox capabilities (list conversations, read threads, send replies, update status).
  • Added specifics on signed reply tokens for later threading, request/response envelope, caching, validation guards, and error handling.
  • Clarified next steps: Gmail outbound adapter, deployment outline, and send idempotency/delivery considerations; adjusted Phase 1 and Foundation spec entries.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

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Reviewing files that changed from the base of the PR and between e6bb96a and e63b6e7.

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• STATUS.md

✅ Files skipped from review due to trivial changes (1)

• STATUS.md

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📝 Walkthrough

Walkthrough

STATUS.md records the completed mail engine and native inbox API, documents API behavior and endpoints, narrows remaining work to outbound-provider integration and deployment, and updates future milestones and the status date.

Changes

Mail engine status

Layer / File(s)	Summary
Completed mail engine and inbox API STATUS.md	The status document describes end-to-end mail processing, foundation specifications, and the four Agent Inbox API v1 endpoints with authentication, error, caching, UUID, and failure-handling behavior.
Delivery roadmap and project status STATUS.md	The roadmap specifies Gmail as the first outbound adapter, deployment components, delivery prerequisites, inbox UI work, deferred surfaces, and the updated status date.

Estimated code review effort: 1 (Trivial) | ~5 minutes

Possibly related PRs

• Helpthread/helpthread#10: Updates STATUS.md with overlapping mail-engine threading, storage, sending, and conversation API status.
• Helpthread/helpthread#13: Updates STATUS.md with overlapping closed-loop mail-engine progress and planned outbound adapter work.

🚥 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 is concise and accurately summarizes the STATUS.md docs update about the completed Agent Inbox API loop.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
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.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch docs/status-api-loop

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[coderabbitai]

Actionable comments posted: 2

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@STATUS.md`:
- Line 40: Remove the duplicate “Agent inbox UI” roadmap entry from the “Not yet
/ deferred” section in STATUS.md, or revise the wording to clearly distinguish
it from the entry under “Next.”
- Line 28: Update the conversation endpoint entries in STATUS.md to include the
implemented /api/v1 route prefix, covering GET, POST, and PATCH paths.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

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Configuration used: defaults

Review profile: CHILL

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Run ID: 79c7a028-22b5-49a6-817d-d3ecdb3cdc40

📥 Commits

Reviewing files that changed from the base of the PR and between 2f90bc6 and e6bb96a.

📒 Files selected for processing (1)

• STATUS.md