fix(extmgr): support Pi 0.70 session startup

[ayagmar]

Summary

• Bump Pi dev dependencies to 0.70.6.
• Remove the removed session_switch extension hook and rely on session_start for session bootstrapping.
• Update the auto-update regression test to exercise replacement-session startup via session_start.

Closes #15.

Verification

• pnpm run check

Summary by CodeRabbit

Release Notes

• Bug Fixes

  • Fixed session initialization to only hydrate configuration and reset auto-update timers on session start, not during session switches.

• Tests

  • Updated auto-update timer validation test.

• Chores

  • Updated development dependency versions.

[coderabbitai]

📝 Walkthrough

Walkthrough

The extensions manager is updated to work with Pi API v0.70.6, which deprecated the session_switch event. The session_switch handler registration is removed from src/index.ts since session_start already handles necessary initialization, and the corresponding test is updated accordingly.

Changes

Cohort / File(s)	Summary
Dependency Updates package.json	Upgraded @mariozechner/pi-coding-agent and @mariozechner/pi-tui from ^0.63.1 to ^0.70.6 to address API compatibility.
Session Switch Removal src/index.ts	Removed the session_switch event handler registration; initialization now occurs solely through session_start which was already present and handles the same bootstrapping logic.
Test Migration test/auto-update.test.ts	Updated auto-update timer shutdown test to invoke session_start with { reason: "resume" } instead of session_switch event, validating timer behavior during replacement session initialization with auto-update disabled.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~12 minutes

Poem

🐰 Old events hop away today,
session_switch goes on its way,
session_start hops in with grace,
Taking over its rightful place!
Version bumps and tests refound,
The manager's back—hip hip, hooray! 🎉

🚥 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 accurately reflects the main objective: updating to Pi 0.70 compatibility by fixing session startup handling.
Linked Issues check	✅ Passed	All requirements from issue #15 are met: session_switch removed, session_start properly used, test updated, and dependencies bumped to 0.70.6.
Out of Scope Changes check	✅ Passed	All changes are directly related to the stated objectives: dependency updates, session hook migration, and test updates align with issue #15 requirements.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/pi-0.70.6-compat

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[coderabbitai]

Caution

Some comments are outside the diff and can’t be posted inline due to platform limitations.

⚠️ Outside diff range comments (1)

test/auto-update.test.ts (1)

76-151: ⚠️ Potential issue | 🟡 Minor

Add session_shutdown call to test the replacement session lifecycle.

The test title states "replacement session" but doesn't exercise the actual replacement flow. Per Pi's session lifecycle, when a session is replaced, session_shutdown is fired on the old session first, then session_start on the new one. Your code registers a session_shutdown handler that stops the timer (in src/index.ts), but the test never invokes it, leaving that cleanup path untested. Additionally, when session_start receives reason: "resume", Pi includes previousSessionFile in the payload, which the test omits.

🧪 Suggested test adjustment

-    await handlers.session_start?.({}, enabledCtx);
+    await handlers.session_start?.({ reason: "startup" }, enabledCtx);
     assert.equal(isAutoUpdateRunning(), true);

-    await handlers.session_start?.({ reason: "resume" }, disabledCtx);
+    await handlers.session_shutdown?.({ reason: "switch" }, enabledCtx);
+    await handlers.session_start?.(
+      { reason: "resume", previousSessionFile: "/tmp/previous-session.pi" },
+      disabledCtx,
+    );
     assert.equal(isAutoUpdateRunning(), false);

🤖 Prompt for AI Agents

Verify each finding against the current code and only fix it if needed.

In `@test/auto-update.test.ts` around lines 76 - 151, The test should simulate the
full replacement lifecycle by invoking the registered session_shutdown on the
old session before starting the new one and include previousSessionFile in the
resume payload; specifically, call the stored handlers.session_shutdown with the
enabledCtx (to trigger the timer-stop cleanup path in your extension's
session_shutdown handler) and then call handlers.session_start with { reason:
"resume", previousSessionFile: "<some path>" } and disabledCtx so the
replacement path in session_start is exercised and the auto-update timer is
correctly stopped.

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.

Outside diff comments:
In `@test/auto-update.test.ts`:
- Around line 76-151: The test should simulate the full replacement lifecycle by
invoking the registered session_shutdown on the old session before starting the
new one and include previousSessionFile in the resume payload; specifically,
call the stored handlers.session_shutdown with the enabledCtx (to trigger the
timer-stop cleanup path in your extension's session_shutdown handler) and then
call handlers.session_start with { reason: "resume", previousSessionFile: "<some
path>" } and disabledCtx so the replacement path in session_start is exercised
and the auto-update timer is correctly stopped.

---

ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 31127b59-3ba7-4f03-a79a-9f559d05dac9

📥 Commits

Reviewing files that changed from the base of the PR and between cd32efc and cb9a2dd.

⛔ Files ignored due to path filters (1)

• pnpm-lock.yaml is excluded by !**/pnpm-lock.yaml

📒 Files selected for processing (3)

• package.json
• src/index.ts
• test/auto-update.test.ts

💤 Files with no reviewable changes (1)

• src/index.ts

[dmg-egg]

lgtm