Add AI session checkpoint command to Other Tools menu

[Copilot]

Long-idle AI sessions are hard to resume because there is no quick way to ask the agent for a compact state summary before continuing. This change adds a dedicated checkpoint command that sends a fixed “stop and summarize” prompt and places it in the Other Tools menu where session-inspection utilities belong.

• New checkpoint command

  • Adds ai-code-session-checkpoint, an interactive command that sends a fixed checkpoint prompt to the active AI session.
  • The prompt asks for:
    • Goal
    • Files changed
    • Current hypothesis
    • Tests/build result
    • Blockers
    • Recommended next action
  • The command then switches focus back to the AI session buffer.

• Menu wiring

  • Adds AI session checkpoint to ai-code--menu-other-tools.
  • Keeps the feature aligned with the requested UX: available under Other Tools, not the main session/actions groups.

• Coverage

  • Adds focused tests for:
    • the exact prompt sent by the new command
    • the transient menu entry and keybinding wiring

(ai-code-session-checkpoint)

;; Sends:
;; Please stop and output a CHECKPOINT:
;; - Goal
;; - Files changed
;; - Current hypothesis
;; - Tests/build result
;; - Blockers
;; - Recommended next action
;; Do not continue editing after this checkpoint

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[Copilot]

Pull request overview

This PR adds a dedicated “session checkpoint” utility to help resume long-idle AI sessions by sending a fixed “stop and summarize” prompt, and exposes it via the Other Tools transient menu group.

Changes:

• Introduces ai-code-session-checkpoint and a fixed ai-code-session-checkpoint-prompt constant.
• Wires the command into ai-code--menu-other-tools on key P.
• Adds ERT coverage for the prompt payload and the menu entry wiring.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
ai-code.el	Adds the checkpoint prompt constant + interactive command; registers it in the “Other Tools” transient group.
test/test_ai-code.el	Adds tests asserting the exact prompt sent and verifying the transient menu entry/keybinding.

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Route checkpoint prompt through session-aware prompt sender

ai-code-session-checkpoint sends directly via ai-code-cli-send-command, which only resolves sessions for the current project context, so this command errors in cases where users have a visible AI session from another directory. Other prompt flows use ai-code--send-prompt (via ai-code--insert-prompt) to detect and target the visible session buffer first, which is exactly the long-idle resume scenario this feature is meant to support. In practice, invoking checkpoint from a buffer without a matching project session can fail with “No … session for this project” instead of checkpointing the active visible session.

Useful? React with 👍 / 👎.

[tninja]

@copilot carefully review the feedbacks, identify ones make sense and address them.

[Copilot]

@copilot carefully review the feedbacks, identify ones make sense and address them.

Addressed the two review points that made sense in 622cdb8: the new checkpoint test mock now accepts &rest args, and the menu-entry test now uses the same (cdr suffix) transient shape as the neighboring tests.

[tninja]

LGTM