[yanmxa]

Purpose

Extract approval, question and secret-input request lifecycle from the TUI into internal/interaction, allowing a future ACP adapter to reuse it.

Responsibilities

Package	Owns
interaction (new)	Request queue, context/owner checks and cancellation replies
app (existing)	Active-request display, user choices, authorization and audit ordering
agent.Runtime (unchanged)	Agent execution

The new package is named interaction, not conversation: it manages requests awaiting an external response, not whole conversations.

API

• Request.Valid(owner) / Cancel(): validate lifetime and ownership; send a nonblocking cancellation reply.
• Queue.Enqueue(request, owner) / Pop(): validate and queue requests; retrieve them in FIFO order.
• Queue.Prune(owner) / Cancel(): remove invalid requests or cancel all queued requests.

The queue is single-owner and starts no goroutines. The TUI retains and validates the active request. Foreground cancellation does not cancel independent background requests with live contexts.

Scope and validation

• No ACP endpoint, SDK update, prompt/turn lifecycle extraction or persistence changes.
• Rebased onto upstream/main at 47479b97 (feat(agent): simplify delegation and continue sessions through SendMessage #692).
• After rename: go test ./..., interaction/TUI race tests, layercheck and make lint passed.
• Consistency review found no blockers; design and implementation plan now distinguish completed interaction extraction from pending shared execution.
• Unrelated local configuration changes are excluded.

[san-ci]

[REVIEW NOTIFIER] This PR requires a review from @zhujian7.

Once this PR has been reviewed and has the lgtm label, it will be automatically squash-merged.

Suggested reviewer

Based on OWNERS, @zhujian7 is suggested to review this PR.

How to get your PR reviewed:

• Address reviewer feedback and push changes
• Reviewer adds lgtm label when satisfied
• An approving review + lgtm will trigger auto-merge

[san-ci]

[REVIEW NOTIFIER] This PR requires a review from @zhujian7.

Once this PR has been reviewed and has the lgtm label, it will be automatically squash-merged.

Suggested reviewer

Based on OWNERS, @zhujian7 is suggested to review this PR.

How to get your PR reviewed:

• Address reviewer feedback and push changes
• Reviewer adds lgtm label when satisfied
• An approving review + lgtm will trigger auto-merge

[yanmxa]

Regression validation completed on the renamed interaction package:

• Real TUI smoke test in an isolated tmux session: first-run theme selection, startup, text submission without a provider (expected error), resize, /help, and /exit (exit code 0).
• Race-enabled tests passed for interaction, app/conv, app, and permission/agent integration suites.
• Live model/tool approval was not exercised in tmux; approval, cancellation and background isolation were covered by automated regressions.
• Remote test, Windows test and vulnerability checks passed; Review Gate remains pending.

[zhujian7]

/lgtm