feat(agent-core-v2): add the permission mode reminder env switch

[elkaix]

Related Issue

No tracked issue; standalone enhancement.

Problem

The auto permission-mode reminder is always injected into the model context. Operators embedding the agent in automated flows have no way to turn it off, and every reminder spends context tokens on a instruction the caller may already enforce.

What changed

• New env switch PYTHINKER_CODE_PERMISSION_MODE_REMINDER: set it to a false value (0, false, off, empty) to stop the auto reminder from being registered with the agent lifecycle. Any other value, or the variable being unset, keeps today's behavior.
• AgentPermissionModeService reads the switch through IBootstrapService.getEnv at construction and skips activateReminderWhenReady when disabled.
• Documented the variable in docs/configuration/env-vars.md.
• Changeset included (minor).

Checklist

• I have read the CONTRIBUTING document.
• No external issue required (maintainer-authored change).
• Added tests: enable-by-default and disable paths covered in permissionMode.test.ts; lifecycle suite stub updated.
• Ran gen-changesets rules; changeset present.
• Doc update included.

Summary by CodeRabbit

• New Features

  • Added the PYTHINKER_CODE_PERMISSION_MODE_REMINDER environment variable to control automatic permission-mode reminders.
  • Set it to false, 0, or an empty value to suppress reminders. Other non-empty values keep them enabled.

• Documentation

  • Added configuration guidance for the new environment variable.

• Bug Fixes

  • Permission-mode reminders now respect the configured environment setting.

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• docs/configuration/env-vars.md
• packages/agent-core-v2/test/session/agentLifecycle/agentLifecycle.test.ts

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📒 Files selected for processing (4)

• .changeset/permission-mode-reminder-env.md
• docs/configuration/env-vars.md
• packages/agent-core-v2/src/agent/permissionMode/permissionModeService.ts
• packages/agent-core-v2/test/agent/permissionMode/permissionMode.test.ts

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• docs/configuration/env-vars.md
• packages/agent-core-v2/test/agent/permissionMode/permissionMode.test.ts

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📝 Walkthrough

Walkthrough

The permission-mode reminder now uses PYTHINKER_CODE_PERMISSION_MODE_REMINDER. The service skips registration for empty or false values. Documentation, a changeset, and tests cover the configuration.

Changes

Permission reminder toggle

Layer / File(s)	Summary
Environment-controlled reminder activation packages/agent-core-v2/src/agent/permissionMode/permissionModeService.ts, docs/configuration/env-vars.md, .changeset/permission-mode-reminder-env.md	AgentPermissionModeService reads the environment through IBootstrapService and conditionally registers the reminder. The documentation and changeset describe the variable.
Reminder toggle test coverage packages/agent-core-v2/test/agent/permissionMode/permissionMode.test.ts, packages/agent-core-v2/test/session/agentLifecycle/agentLifecycle.test.ts	Tests verify that 0 and empty values suppress injection and that 1 allows injection. The lifecycle fixture now provides getEnv.

Priority: ⬇️ Low

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Feature

Merge Risk: ⚪ Minimal · up to c19e8

The permission reminder toggle is documented, and the previously identified behavior and release-classification issues are resolved.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title uses the required feat conventional-commit prefix, stays within 72 characters, uses imperative wording, and accurately describes the environment switch.
Description check	✅ Passed	The description includes the problem, implementation details, tests, documentation, and changeset status. It explains that no issue applies because this is a maintainer-authored change.
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 3…
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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[pkg-pr-new]

pnpm dlx https://pkg.pr.new/@pymodel/pythinker-code@2b761b4

npx https://pkg.pr.new/@pymodel/pythinker-code@2b761b4

commit: 2b761b4

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Actionable comments posted: 2

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Inline comments:
In @.changeset/permission-mode-reminder-env.md:
- Line 2: Update the changeset declaration for `@pymodel/pythinker-code` from
patch to minor to reflect the added user-configurable environment setting.

In `@packages/agent-core-v2/src/agent/permissionMode/permissionModeService.ts`:
- Line 44: Update the permission-mode reminder guard around parseBooleanEnv and
PERMISSION_MODE_REMINDER_ENV so both unset and explicitly empty values skip
activateReminderWhenReady, while preserving existing behavior for configured
boolean values. Add a Vitest case covering '' and update the corresponding
configuration documentation entry to state that an empty value disables the
reminder.

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📒 Files selected for processing (5)

• .changeset/permission-mode-reminder-env.md
• docs/configuration/env-vars.md
• packages/agent-core-v2/src/agent/permissionMode/permissionModeService.ts
• packages/agent-core-v2/test/agent/permissionMode/permissionMode.test.ts
• packages/agent-core-v2/test/session/agentLifecycle/agentLifecycle.test.ts

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