diff --git a/openspec/changes/agent-codex-takeover-task-7d894129d262-2026-04-24-17-47/.openspec.yaml b/openspec/changes/agent-codex-takeover-task-7d894129d262-2026-04-24-17-47/.openspec.yaml
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+++ b/openspec/changes/agent-codex-takeover-task-7d894129d262-2026-04-24-17-47/.openspec.yaml
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+schema: spec-driven
+created: 2026-04-24
diff --git a/openspec/changes/agent-codex-takeover-task-7d894129d262-2026-04-24-17-47/proposal.md b/openspec/changes/agent-codex-takeover-task-7d894129d262-2026-04-24-17-47/proposal.md
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+++ b/openspec/changes/agent-codex-takeover-task-7d894129d262-2026-04-24-17-47/proposal.md
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+## Why
+
+- TODO: describe the user/problem outcome this change addresses.
+
+## What Changes
+
+- TODO: summarize the intended behavior and scope.
+
+## Impact
+
+- TODO: call out risks, rollout notes, and affected surfaces.
diff --git a/openspec/changes/agent-codex-takeover-task-7d894129d262-2026-04-24-17-47/specs/agent-codex-takeover-task-7d894129d262-2026-04-24-17-47/spec.md b/openspec/changes/agent-codex-takeover-task-7d894129d262-2026-04-24-17-47/specs/agent-codex-takeover-task-7d894129d262-2026-04-24-17-47/spec.md
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+++ b/openspec/changes/agent-codex-takeover-task-7d894129d262-2026-04-24-17-47/specs/agent-codex-takeover-task-7d894129d262-2026-04-24-17-47/spec.md
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+## ADDED Requirements
+
+### Requirement: agent-codex-takeover-task-7d894129d262-2026-04-24-17-47 behavior
+The system SHALL enforce agent-codex-takeover-task-7d894129d262-2026-04-24-17-47 behavior as defined by this change.
+
+#### Scenario: Baseline acceptance
+- **WHEN** agent-codex-takeover-task-7d894129d262-2026-04-24-17-47 behavior is exercised
+- **THEN** the expected outcome is produced
+- **AND** regressions are covered by tests.
diff --git a/openspec/changes/agent-codex-takeover-task-7d894129d262-2026-04-24-17-47/tasks.md b/openspec/changes/agent-codex-takeover-task-7d894129d262-2026-04-24-17-47/tasks.md
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+++ b/openspec/changes/agent-codex-takeover-task-7d894129d262-2026-04-24-17-47/tasks.md
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+## Definition of Done
+
+This change is complete only when **all** of the following are true:
+
+- Every checkbox below is checked.
+- The agent branch reaches `MERGED` state on `origin` and the PR URL + state are recorded in the completion handoff.
+- If any step blocks (test failure, conflict, ambiguous result), append a `BLOCKED:` line under section 4 explaining the blocker and **STOP**. Do not tick remaining cleanup boxes; do not silently skip the cleanup pipeline.
+
+## Handoff
+
+- Handoff: change=`agent-codex-takeover-task-7d894129d262-2026-04-24-17-47`; branch=`agent/codex/takeover-task-7d894129d262-2026-04-24-17-47`; scope=`TODO`; action=`continue this sandbox or finish cleanup after a usage-limit/manual takeover`.
+- Copy prompt: Continue `agent-codex-takeover-task-7d894129d262-2026-04-24-17-47` on branch `agent/codex/takeover-task-7d894129d262-2026-04-24-17-47`. Work inside the existing sandbox, review `openspec/changes/agent-codex-takeover-task-7d894129d262-2026-04-24-17-47/tasks.md`, continue from the current state instead of creating a new sandbox, and when the work is done run `gx branch finish --branch agent/codex/takeover-task-7d894129d262-2026-04-24-17-47 --base main --via-pr --wait-for-merge --cleanup`.
+
+## 1. Specification
+
+- [ ] 1.1 Finalize proposal scope and acceptance criteria for `agent-codex-takeover-task-7d894129d262-2026-04-24-17-47`.
+- [ ] 1.2 Define normative requirements in `specs/agent-codex-takeover-task-7d894129d262-2026-04-24-17-47/spec.md`.
+
+## 2. Implementation
+
+- [ ] 2.1 Implement scoped behavior changes.
+- [ ] 2.2 Add/update focused regression coverage.
+
+## 3. Verification
+
+- [ ] 3.1 Run targeted project verification commands.
+- [ ] 3.2 Run `openspec validate agent-codex-takeover-task-7d894129d262-2026-04-24-17-47 --type change --strict`.
+- [ ] 3.3 Run `openspec validate --specs`.
+
+## 4. Cleanup (mandatory; run before claiming completion)
+
+- [ ] 4.1 Run the cleanup pipeline: `gx branch finish --branch agent/codex/takeover-task-7d894129d262-2026-04-24-17-47 --base main --via-pr --wait-for-merge --cleanup`. This handles commit -> push -> PR create -> merge wait -> worktree prune in one invocation.
+- [ ] 4.2 Record the PR URL and final merge state (`MERGED`) in the completion handoff.
+- [ ] 4.3 Confirm the sandbox worktree is gone (`git worktree list` no longer shows the agent path; `git branch -a` shows no surviving local/remote refs for the branch).