Merge branch 'codex/tool-json-schema-dsl' into codex/canonical-tool-output

# Conflicts:
#	.agents/notes/implemented/feature/2026-06-30-interception-seams.md
#	docs/config-catalog.md
#	docs/cookbook/adding-a-tool.i18n.yaml
#	docs/cookbook/adding-a-tool.md
#	docs/cookbook/adding-a-tool.zh.md
#	docs/cordis-catalog/events.md
#	docs/cordis-catalog/services.md
#	docs/core-data-structures/tools.md
#	docs/event-producer-consumer.md
#	docs/persistence-catalog.md
#	examples/acp-agent/tests/snapshots/cordis-inspect-jsdoc/session.jsonl
#	examples/acp-agent/tests/snapshots/cordis-inspect-jsdoc/stdout.expected.jsonl
#	packages/bash/tool-bash/src/index.ts
#	packages/core/agent-loop/src/tool-calls.ts
#	packages/core/agent-loop/tests/cancel.spec.ts
#	packages/core/agent-loop/tests/contract-regressions.spec.ts
#	packages/core/agent-loop/tests/tool-calls.spec.ts
#	packages/core/tools/README.md
#	packages/core/tools/src/index.ts
#	packages/core/tools/tests/code-mode.spec.ts
#	packages/core/tools/tests/tools.spec.ts
#	packages/fs/tool-fs-search/tests/integration.spec.ts
#	packages/fs/tool-fs-search/tests/tools.spec.ts
#	packages/fs/tool-fs/tests/integration.spec.ts
#	packages/mcp/mcp-client/src/tools.ts
#	packages/timeout/timeout-policy/tests/timeout-policy.spec.ts
#	packages/web/tool-web/tests/integration.spec.ts
#	packages/web/tool-web/tests/tool-web.spec.ts

packages/ui/tui/src/index.ts

@@ -1337,7 +1337,7 @@ export function createTuiChat(
             : event.data.reason.message
           if (!liveErrors.delete(key)) appendNotice(message, 'error')
         } else if (event.data.reason.kind === 'aborted') {
-          appendNotice(event.data.reason.reason ?? 'Turn cancelled.', 'warning')
+          appendNotice('Turn cancelled.', 'warning')
         } else if (event.data.reason.kind === 'max-tokens') {
           appendNotice('The model reached its output-token limit.', 'warning')
         } else if (event.data.reason.kind === 'rejected') {
@@ -1484,7 +1484,7 @@ export function createTuiChat(
 
   const requestExit = (): void => {
     if (agent.status === 'running') {
-      agent.cancel('terminal exit requested')
+      agent.cancel({ kind: 'user' })
       appendNotice('Cancelling the active turn before exit…', 'warning')
       void agent.whenIdle().then(() => shutdown(true))
       return
@@ -1567,7 +1567,7 @@ export function createTuiChat(
       description: 'Cancel the active turn',
       handler: () => {
         if (agent.status !== 'running') return { kind: 'error', text: 'The agent is already idle.' }
-        agent.cancel('cancelled from terminal')
+        agent.cancel({ kind: 'user' })
         return { kind: 'success', text: 'Cancellation requested.' }
       },
     })
@@ -1647,12 +1647,12 @@ export function createTuiChat(
       return { consume: true }
     }
     if (matchesKey(data, Key.escape) && agent.status === 'running') {
-      agent.cancel('cancelled from terminal')
+      agent.cancel({ kind: 'user' })
       return { consume: true }
     }
     if (matchesKey(data, Key.ctrl('c'))) {
       if (agent.status === 'running') {
-        agent.cancel('cancelled from terminal')
+        agent.cancel({ kind: 'user' })
       } else if (editor.getText() !== '') {
         editor.setText('')
       } else {