Merge remote-tracking branch 'origin/master' into codex/tool-json-schema-dsl

examples/acp-agent/pty-snapshot-backend.mjs

@@ -0,0 +1,64 @@
+/** Deterministic in-memory PTY backend for transcript snapshots. */
+
+class SnapshotSession {
+  motd = 'dsh> '
+  statusValue = { kind: 'running' }
+  scrollback = 'dsh> '
+
+  startSend(request) {
+    const viewport = `${request.text}\nPTY_OK\ndsh> `
+    this.scrollback += viewport
+    const result = {
+      viewport,
+      waitReason: 'stdin_read',
+      sessionStatus: this.statusValue,
+      truncated: false,
+    }
+    let consumed = false
+    return {
+      done: Promise.resolve(result),
+      readOutput: () => {
+        if (consumed) return { delta: '', truncated: false }
+        consumed = true
+        return { delta: viewport, truncated: false }
+      },
+      cancel: () => false,
+    }
+  }
+
+  read(request) {
+    const lines = this.scrollback.split('\n')
+    const offset = request.offset ?? 0
+    const count = request.count ?? 500
+    const end = lines.length - offset
+    const start = Math.max(0, end - count)
+    const text = lines.slice(start, end).join('\n')
+    return { text, totalLines: lines.length, lineBegin: offset, lineEnd: offset + text.split('\n').length, truncated: false }
+  }
+
+  signal() {
+    return Promise.resolve({ delivered: true, targetPgid: 1 })
+  }
+
+  status() {
+    return this.statusValue
+  }
+
+  close() {
+    this.statusValue = { kind: 'exited', exitCode: 0, signal: null }
+    return Promise.resolve()
+  }
+}
+
+/** Cordis plugin name. */
+export const name = 'pty-snapshot-backend'
+/** Required PTY service. */
+export const inject = ['pty']
+
+/** Register the deterministic snapshot backend. */
+export function apply(ctx) {
+  ctx.pty.registerBackend({
+    type: 'shell',
+    spawn: () => Promise.resolve(new SnapshotSession()),
+  })
+}

examples/acp-agent/pty.cordis.snapshot.yml

@@ -0,0 +1,25 @@
+# Keyless replay counterpart to pty.cordis.yml.
+- id: base
+  name: '@cordisjs/plugin-include'
+  config:
+    path: ./cordis.yml
+    patches:
+      - id: llm-deepseek
+        name: '@deepseek-ai/dsh-llm-deepseek'
+        disabled: true
+      - insert:
+          - id: pty
+            name: '@deepseek-ai/dsh-pty'
+          - id: pty-snapshot-backend
+            name: './pty-snapshot-backend.mjs'
+          - id: tool-pty
+            name: '@deepseek-ai/dsh-tool-pty'
+          - id: llm-replay
+            name: '@deepseek-ai/dsh-llm-replay'
+            config:
+              providers:
+                - id: deepseek
+                  name: DeepSeek
+                  models:
+                    - id: deepseek-v4-flash
+                    - id: deepseek-v4-pro

examples/acp-agent/pty.cordis.yml

@@ -0,0 +1,20 @@
+# Opt-in persistent PTY composition for the PTY snapshot scenario. The base
+# deployment already owns the shared sandbox provider and policy.
+- id: base
+  name: '@cordisjs/plugin-include'
+  config:
+    path: ./cordis.yml
+    patches:
+      - insert:
+          - id: pty
+            name: '@deepseek-ai/dsh-pty'
+          - id: pty-local
+            name: '@deepseek-ai/dsh-pty-local'
+            config:
+              pollIntervalMs: 10
+              exactProbeAfterMs: 20
+              idleSilenceMs: 250
+              timeoutMs: 2000
+              disposeGraceMs: 500
+          - id: tool-pty
+            name: '@deepseek-ai/dsh-tool-pty'

examples/acp-agent/tests/acp.snapshot.ts

@@ -34,6 +34,7 @@ const BOTH_MODE_CONFIG = fileURLToPath(new URL('../both-mode.cordis.yml', import
 const WORKSPACE_CONTEXT_CONFIG = fileURLToPath(new URL('../workspace-context.cordis.yml', import.meta.url))
 const ADVANCED_CONFIG = fileURLToPath(new URL('../advanced.cordis.yml', import.meta.url))
 const FS_CONFIG = fileURLToPath(new URL('../fs.cordis.yml', import.meta.url))
+const PTY_CONFIG = fileURLToPath(new URL('../pty.cordis.yml', import.meta.url))
 const DEPTH_TWO_CONFIG = fileURLToPath(new URL('../depth-two.cordis.yml', import.meta.url))
 const PACKED_CHUNKS_CONFIG = fileURLToPath(new URL('../packed-chunks.cordis.yml', import.meta.url))
 const SESSION_SANDBOX_ROOT_CONFIG = fileURLToPath(new URL('../session-sandbox-root.cordis.yml', import.meta.url))
@@ -99,6 +100,14 @@ const SCENARIOS: Scenario[] = [
     configPath: FS_CONFIG,
   },
   { name: 'bash-spill', hasModelTurn: true, recorded: false, configPath: FS_CONFIG },
+  {
+    name: 'pty-tools',
+    hasModelTurn: true,
+    recorded: false,
+    pinsHeader: true,
+    headerClass: 'pty',
+    configPath: PTY_CONFIG,
+  },
   { name: 'fs-terminal-card', hasModelTurn: true, recorded: true },
   { name: 'todo-plan', hasModelTurn: true, recorded: true },
   { name: 'skill-load', hasModelTurn: true, recorded: false, pinsHeader: true, headerClass: 'skill' },

examples/acp-agent/tests/snapshots/pty-tools/input.json

@@ -0,0 +1,7 @@
+{
+  "steps": [
+    { "op": "initialize", "terminalOutput": true },
+    { "op": "newSession" },
+    { "op": "prompt", "text": "Exercise the six PTY tools in order, including one missing-session signal error, then reply DONE." }
+  ]
+}

examples/acp-agent/tests/snapshots/pty-tools/session.jsonl

@@ -0,0 +1,74 @@
+{"type":"session","version":0,"id":"{{sessionId}}","createdAt":0,"cwd":"{{cwd}}","delegationDepth":0}
+{"type":"turn/start","seq":0,"time":0,"data":{"turn":1,"trigger":{"kind":"message","source":{"kind":"user"}}}}
+{"type":"user/message","seq":1,"time":0,"data":{"content":[{"type":"text","text":"Exercise the six PTY tools in order, including one missing-session signal error, then reply DONE."}],"source":{"kind":"user"}},"surfaceOp":"append"}
+{"type":"session/title","seq":2,"time":0,"data":{"title":"Exercise the six PTY tools","messageSeqs":[1],"source":{"kind":"fallback"}}}
+{"type":"step/start","seq":3,"time":0,"data":{"turn":1,"step":1}}
+{"type":"request/header","seq":4,"time":0,"data":{"header":{"config":{"provider":"deepseek","model":"deepseek-v4-pro"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"assistant/chunk","seq":5,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
+{"type":"assistant/chunk","seq":6,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"pty-spawn","name":"terminal_open","argumentsDelta":"{\"type\":\"shell\",\"name\":\"main\"}"}}}
+{"type":"assistant/chunk","seq":7,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"pty-spawn","name":"terminal_open","arguments":"{\"type\":\"shell\",\"name\":\"main\"}"}}}}
+{"type":"assistant/chunk","seq":8,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
+{"type":"assistant/chunk","seq":9,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","seq":10,"time":0,"data":{"turn":1,"step":1,"content":[{"type":"tool-call","id":"pty-spawn","name":"terminal_open","arguments":"{\"type\":\"shell\",\"name\":\"main\"}"}],"provenance":{"provider":"deepseek","model":"deepseek-v4-pro"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[5,6,7,8,9],"surfaceOp":"append"}
+{"type":"tool/call","seq":11,"time":0,"data":{"turn":1,"step":1,"callId":"pty-spawn","name":"terminal_open","arguments":"{\"type\":\"shell\",\"name\":\"main\"}"}}
+{"type":"tool/result","seq":12,"time":0,"data":{"turn":1,"step":1,"callId":"pty-spawn","content":[{"type":"text","text":"started terminal session pty-1 (main) [type: shell]\ndsh> "}],"isError":false},"sourceEventSeqs":[11],"surfaceOp":"append"}
+{"type":"step/end","seq":13,"time":0,"data":{"turn":1,"step":1}}
+{"type":"step/start","seq":14,"time":0,"data":{"turn":1,"step":2}}
+{"type":"assistant/chunk","seq":15,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
+{"type":"assistant/chunk","seq":16,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"tool-call-delta","index":0,"id":"pty-send","name":"terminal_send","argumentsDelta":"{\"sessionId\":\"pty-1\",\"text\":\"printf 'PTY_OK\\\\n'\"}"}}}
+{"type":"assistant/chunk","seq":17,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"pty-send","name":"terminal_send","arguments":"{\"sessionId\":\"pty-1\",\"text\":\"printf 'PTY_OK\\\\n'\"}"}}}}
+{"type":"assistant/chunk","seq":18,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
+{"type":"assistant/chunk","seq":19,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","seq":20,"time":0,"data":{"turn":1,"step":2,"content":[{"type":"tool-call","id":"pty-send","name":"terminal_send","arguments":"{\"sessionId\":\"pty-1\",\"text\":\"printf 'PTY_OK\\\\n'\"}"}],"provenance":{"provider":"deepseek","model":"deepseek-v4-pro"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[15,16,17,18,19],"surfaceOp":"append"}
+{"type":"tool/call","seq":21,"time":0,"data":{"turn":1,"step":2,"callId":"pty-send","name":"terminal_send","arguments":"{\"sessionId\":\"pty-1\",\"text\":\"printf 'PTY_OK\\\\n'\"}"}}
+{"type":"tool/result","seq":22,"time":0,"data":{"turn":1,"step":2,"callId":"pty-send","content":[{"type":"text","text":"printf 'PTY_OK\\n'\nPTY_OK\ndsh> \n[wait: stdin_read]\n[session: running]"}],"isError":false,"meta":{"viewport":"printf 'PTY_OK\\n'\nPTY_OK\ndsh> ","waitReason":"stdin_read","sessionStatus":{"kind":"running"},"truncated":false}},"sourceEventSeqs":[21],"surfaceOp":"append"}
+{"type":"step/end","seq":23,"time":0,"data":{"turn":1,"step":2}}
+{"type":"step/start","seq":24,"time":0,"data":{"turn":1,"step":3}}
+{"type":"assistant/chunk","seq":25,"time":0,"data":{"turn":1,"step":3,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
+{"type":"assistant/chunk","seq":26,"time":0,"data":{"turn":1,"step":3,"chunk":{"type":"tool-call-delta","index":0,"id":"pty-read","name":"terminal_read","argumentsDelta":"{\"sessionId\":\"pty-1\",\"offset\":0,\"count\":20}"}}}
+{"type":"assistant/chunk","seq":27,"time":0,"data":{"turn":1,"step":3,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"pty-read","name":"terminal_read","arguments":"{\"sessionId\":\"pty-1\",\"offset\":0,\"count\":20}"}}}}
+{"type":"assistant/chunk","seq":28,"time":0,"data":{"turn":1,"step":3,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
+{"type":"assistant/chunk","seq":29,"time":0,"data":{"turn":1,"step":3,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","seq":30,"time":0,"data":{"turn":1,"step":3,"content":[{"type":"tool-call","id":"pty-read","name":"terminal_read","arguments":"{\"sessionId\":\"pty-1\",\"offset\":0,\"count\":20}"}],"provenance":{"provider":"deepseek","model":"deepseek-v4-pro"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[25,26,27,28,29],"surfaceOp":"append"}
+{"type":"tool/call","seq":31,"time":0,"data":{"turn":1,"step":3,"callId":"pty-read","name":"terminal_read","arguments":"{\"sessionId\":\"pty-1\",\"offset\":0,\"count\":20}"}}
+{"type":"tool/result","seq":32,"time":0,"data":{"turn":1,"step":3,"callId":"pty-read","content":[{"type":"text","text":"dsh> printf 'PTY_OK\\n'\nPTY_OK\ndsh> \n[lines: 0-3 of 3]"}],"isError":false},"sourceEventSeqs":[31],"surfaceOp":"append"}
+{"type":"step/end","seq":33,"time":0,"data":{"turn":1,"step":3}}
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+{"type":"assistant/chunk","seq":37,"time":0,"data":{"turn":1,"step":4,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"pty-signal","name":"terminal_signal","arguments":"{\"sessionId\":\"pty-missing\",\"signal\":\"SIGINT\"}"}}}}
+{"type":"assistant/chunk","seq":38,"time":0,"data":{"turn":1,"step":4,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
+{"type":"assistant/chunk","seq":39,"time":0,"data":{"turn":1,"step":4,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","seq":40,"time":0,"data":{"turn":1,"step":4,"content":[{"type":"tool-call","id":"pty-signal","name":"terminal_signal","arguments":"{\"sessionId\":\"pty-missing\",\"signal\":\"SIGINT\"}"}],"provenance":{"provider":"deepseek","model":"deepseek-v4-pro"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[35,36,37,38,39],"surfaceOp":"append"}
+{"type":"tool/call","seq":41,"time":0,"data":{"turn":1,"step":4,"callId":"pty-signal","name":"terminal_signal","arguments":"{\"sessionId\":\"pty-missing\",\"signal\":\"SIGINT\"}"}}
+{"type":"tool/result","seq":42,"time":0,"data":{"turn":1,"step":4,"callId":"pty-signal","content":[{"type":"text","text":"Error: unknown PTY session pty-missing"}],"isError":true},"sourceEventSeqs":[41],"surfaceOp":"append"}
+{"type":"step/end","seq":43,"time":0,"data":{"turn":1,"step":4}}
+{"type":"step/start","seq":44,"time":0,"data":{"turn":1,"step":5}}
+{"type":"assistant/chunk","seq":45,"time":0,"data":{"turn":1,"step":5,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
+{"type":"assistant/chunk","seq":46,"time":0,"data":{"turn":1,"step":5,"chunk":{"type":"tool-call-delta","index":0,"id":"pty-kill","name":"terminal_close","argumentsDelta":"{\"sessionId\":\"pty-1\"}"}}}
+{"type":"assistant/chunk","seq":47,"time":0,"data":{"turn":1,"step":5,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"pty-kill","name":"terminal_close","arguments":"{\"sessionId\":\"pty-1\"}"}}}}
+{"type":"assistant/chunk","seq":48,"time":0,"data":{"turn":1,"step":5,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
+{"type":"assistant/chunk","seq":49,"time":0,"data":{"turn":1,"step":5,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","seq":50,"time":0,"data":{"turn":1,"step":5,"content":[{"type":"tool-call","id":"pty-kill","name":"terminal_close","arguments":"{\"sessionId\":\"pty-1\"}"}],"provenance":{"provider":"deepseek","model":"deepseek-v4-pro"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[45,46,47,48,49],"surfaceOp":"append"}
+{"type":"tool/call","seq":51,"time":0,"data":{"turn":1,"step":5,"callId":"pty-kill","name":"terminal_close","arguments":"{\"sessionId\":\"pty-1\"}"}}
+{"type":"tool/result","seq":52,"time":0,"data":{"turn":1,"step":5,"callId":"pty-kill","content":[{"type":"text","text":"closed terminal session pty-1"}],"isError":false},"sourceEventSeqs":[51],"surfaceOp":"append"}
+{"type":"step/end","seq":53,"time":0,"data":{"turn":1,"step":5}}
+{"type":"step/start","seq":54,"time":0,"data":{"turn":1,"step":6}}
+{"type":"assistant/chunk","seq":55,"time":0,"data":{"turn":1,"step":6,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
+{"type":"assistant/chunk","seq":56,"time":0,"data":{"turn":1,"step":6,"chunk":{"type":"tool-call-delta","index":0,"id":"pty-list","name":"terminal_list","argumentsDelta":"{}"}}}
+{"type":"assistant/chunk","seq":57,"time":0,"data":{"turn":1,"step":6,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"pty-list","name":"terminal_list","arguments":"{}"}}}}
+{"type":"assistant/chunk","seq":58,"time":0,"data":{"turn":1,"step":6,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
+{"type":"assistant/chunk","seq":59,"time":0,"data":{"turn":1,"step":6,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
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+{"type":"tool/call","seq":61,"time":0,"data":{"turn":1,"step":6,"callId":"pty-list","name":"terminal_list","arguments":"{}"}}
+{"type":"tool/result","seq":62,"time":0,"data":{"turn":1,"step":6,"callId":"pty-list","content":[{"type":"text","text":"(no terminal sessions)"}],"isError":false},"sourceEventSeqs":[61],"surfaceOp":"append"}
+{"type":"step/end","seq":63,"time":0,"data":{"turn":1,"step":6}}
+{"type":"step/start","seq":64,"time":0,"data":{"turn":1,"step":7}}
+{"type":"assistant/chunk","seq":65,"time":0,"data":{"turn":1,"step":7,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","seq":66,"time":0,"data":{"turn":1,"step":7,"chunk":{"type":"text-delta","index":0,"text":"DONE"}}}
+{"type":"assistant/chunk","seq":67,"time":0,"data":{"turn":1,"step":7,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"DONE"}}}}
+{"type":"assistant/chunk","seq":68,"time":0,"data":{"turn":1,"step":7,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":3}}}}
+{"type":"assistant/chunk","seq":69,"time":0,"data":{"turn":1,"step":7,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","seq":70,"time":0,"data":{"turn":1,"step":7,"content":[{"type":"text","text":"DONE"}],"provenance":{"provider":"deepseek","model":"deepseek-v4-pro"},"usage":{"inputTokens":10,"outputTokens":3}},"sourceEventSeqs":[65,66,67,68,69],"surfaceOp":"append"}
+{"type":"step/end","seq":71,"time":0,"data":{"turn":1,"step":7}}
+{"type":"turn/end","seq":72,"time":0,"data":{"turn":1,"reason":{"kind":"completed"}}}

examples/acp-agent/tests/snapshots/pty-tools/stdout.expected.jsonl

@@ -0,0 +1,18 @@
+{"jsonrpc":"2.0","id":1,"result":{"protocolVersion":1,"agentInfo":{"name":"deepseek-harness-acp","version":"0.0.1"},"agentCapabilities":{"loadSession":true,"promptCapabilities":{"image":false,"audio":false,"embeddedContext":false}},"authMethods":[]}}
+{"jsonrpc":"2.0","id":2,"result":{"sessionId":"{{sessionId}}","modes":{"availableModes":[{"id":"default","name":"default"},{"id":"plan","name":"plan"}],"currentModeId":"default"},"configOptions":[{"id":"model","name":"Model","description":"Sets this session's provider and model.","category":"model","type":"select","currentValue":"[\"deepseek\",\"deepseek-v4-pro\"]","options":[{"value":"[\"deepseek\",\"deepseek-v4-flash\"]","name":"deepseek-v4-flash"},{"value":"[\"deepseek\",\"deepseek-v4-pro\"]","name":"deepseek-v4-pro"}]},{"id":"permission","name":"Permissions","description":"The session permission preset: each choice bundles a sandbox mode and an approval policy.","category":"mode","type":"select","currentValue":"danger-full-access","options":[{"value":"workspace-write","name":"workspace-write","description":"Write inside the workspace and permitted temporary directories; wider retries require approval."},{"value":"danger-full-access","name":"danger-full-access","description":"Full file access without approval prompts."}]}]}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"available_commands_update","availableCommands":[{"name":"goal","description":"set or view the goal for a long-running task","input":{"hint":"[<objective>|clear|edit <objective>|pause|resume]"}},{"name":"plan","description":"Enter plan mode","input":{"hint":"[message]"}}]}}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"session_info_update","title":"Exercise the six PTY tools","updatedAt":"{{updatedAt}}"}}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"pty-spawn","title":"Open terminal main","kind":"execute","status":"in_progress"}}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"pty-spawn","status":"completed","content":[{"type":"content","content":{"type":"text","text":"started terminal session pty-1 (main) [type: shell]\ndsh> "}}]}}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"pty-send","title":"printf 'PTY_OK\\n'","kind":"execute","status":"in_progress","rawInput":"printf 'PTY_OK\\n'","content":[{"type":"content","content":{"type":"text","text":"Terminal pty-1"}},{"type":"terminal","terminalId":"pty-send"}],"_meta":{"terminal_info":{"terminal_id":"pty-send","cwd":"{{cwd}}"}}}}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"pty-send","status":"completed","_meta":{"terminal_output":{"terminal_id":"pty-send","data":"printf 'PTY_OK\\n'\nPTY_OK\ndsh> \n[wait: stdin_read]\n[session: running]"}}}}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"pty-read","title":"Read terminal pty-1","kind":"read","status":"in_progress","rawInput":{"sessionId":"pty-1","offset":0,"count":20}}}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"pty-read","status":"completed","content":[{"type":"content","content":{"type":"text","text":"dsh> printf 'PTY_OK\\n'\nPTY_OK\ndsh> \n[lines: 0-3 of 3]"}}]}}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"pty-signal","title":"Signal terminal pty-missing","kind":"execute","status":"in_progress","rawInput":{"sessionId":"pty-missing","signal":"SIGINT"}}}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"pty-signal","status":"failed","content":[{"type":"content","content":{"type":"text","text":"Error: unknown PTY session pty-missing"}}]}}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"pty-kill","title":"Close terminal pty-1","kind":"delete","status":"in_progress"}}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"pty-kill","status":"completed","content":[{"type":"content","content":{"type":"text","text":"closed terminal session pty-1"}}]}}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call","toolCallId":"pty-list","title":"List terminal sessions","kind":"read","status":"in_progress"}}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"tool_call_update","toolCallId":"pty-list","status":"completed","content":[{"type":"content","content":{"type":"text","text":"(no terminal sessions)"}}]}}}
+{"jsonrpc":"2.0","method":"session/update","params":{"sessionId":"{{sessionId}}","update":{"sessionUpdate":"agent_message_chunk","content":{"type":"text","text":"DONE"}}}}
+{"jsonrpc":"2.0","id":3,"result":{"stopReason":"end_turn"}}

examples/acp-agent/tests/snapshots/pty-tools/system-prompt.expected.md

@@ -0,0 +1,27 @@
+You are an AI agent powered by the DeepSeek Harness SDK.
+
+You are a coding assistant powered by the deepseek-v4-pro model. Your working directory is {{cwd}}. Your bash tool runs under a file sandbox — a `[sandbox: file access denied …]` result is policy, not a command bug.
+
+Verify your work by running the code or tests. Keep answers brief and factual.
+
+
+Use the read tool — not shell commands like cat — to inspect text files. Results include line numbers. Use offset and limit to continue reading large files.
+
+Use the write tool to create files or completely replace file contents. Existing files are overwritten, so read an existing file first (the default fs-policy requires it) and prefer edit for targeted changes.
+
+Use the edit tool for targeted changes to existing UTF-8 text files. It replaces literal old_string with new_string; by default old_string must appear exactly once. If old_string appears multiple times, provide a more specific old_string or set replace_all to true. Read the file first (the default fs-policy requires it), unless you just created or edited it in this session.
+
+Check the [exit code: N] marker on every bash result; investigate failures before moving on.
+
+Use a terminal session only when work needs persistent terminal state or interactive stdin; prefer bash/read/write/edit for bounded one-shot operations. Track every terminal session id and close sessions that no longer matter. An inferred_idle or timeout result does not prove the foreground command exited.
+
+Track every background task id you start. You are notified in-session when a task finishes — do not busy-poll or sleep on one; keep working on independent steps and do not duplicate a running task's work. Before giving a final answer, collect every still-relevant task with task_output (set wait: true only when you are genuinely blocked on it), and task_kill tasks that stopped mattering.
+
+Use goal tools for one long-running completion objective in the current session. create_goal may infer goal intent from a direct human request in any language; do not create a goal for routine single-turn work. Call get_goal before update_goal and copy its exact goal_id and revision. After session resume or fork, an active goal is disarmed: when a human asks to continue or resume in any wording or language, use update_goal action resume to rearm it. Mark complete only when the objective is actually achieved. Mark blocked only after the same blocking condition persists for at least 3 consecutive goal rounds, and report that concrete condition in blocked_reason; difficulty, uncertainty, or useful remaining work is not blocked.
+
+Approval prompts are disabled in this session: actions that require approval are rejected automatically — do not request sandbox escalation (do not set `sandbox_permissions`).
+<!-- dsh-user-approval-policy:never -->
+
+Use the workflow tool ONLY when the user explicitly asks for a workflow or for large multi-agent orchestration: you write a JavaScript script (the tool description documents the exact format) that fans work out across many subagents with phases and structured results. For one or two delegations, prefer plain subagent calls.
+
+Use the ralph tool ONLY when the direct human explicitly asks for a Ralph loop or fresh-agent iterative execution. Each Ralph round starts a fresh child with no conversation seed and uses the shared workspace as durable memory. Completion and blockers are worker reports, not independent evaluation. Use same-session goal tools for ordinary long-running objectives, and plain subagents or workflows for bounded delegation and fan-out.

examples/acp-agent/tests/snapshots/pty-tools/tool-schemas.expected.json

@@ -0,0 +1,675 @@
+{
+  "initial": [
+    {
+      "name": "ask_user_question",
+      "description": "Ask the user a concise question when you need confirmation, a choice, or missing information before proceeding. Send one or more questions, each with a stable id that will be echoed in the answer.",
+      "parameters": {
+        "type": "object",
+        "properties": {
+          "questions": {
+            "type": "array",
+            "description": "Questions to ask the user before continuing.",
+            "items": {
+              "type": "object",
+              "properties": {
+                "id": {
+                  "type": "string",
+                  "description": "Stable id for this question; echoed in the answer."
+                },
+                "question": {
+                  "type": "string",
+                  "description": "The specific question to ask the user."
+                },
+                "header": {
+                  "type": "string",
+                  "description": "Optional short heading for the question, such as \"Confirm\" or \"Choose Mode\"."
+                },
+                "options": {
+                  "type": "array",
+                  "description": "Optional choices to show the user. If you recommend one, put it first and append \"(Recommended)\" to that label.",
+                  "items": {
+                    "type": "object",
+                    "properties": {
+                      "label": {
+                        "type": "string",
+                        "description": "Short user-facing option label."
+                      },
+                      "description": {
+                        "type": "string",
+                        "description": "One sentence explaining the tradeoff or impact."
+                      }
+                    },
+                    "required": [
+                      "label"
+                    ]
+                  }
+                },
+                "multi_select": {
+                  "type": "boolean",
+                  "description": "Whether the user may select more than one option. Defaults to false."
+                }
+              },
+              "required": [
+                "id",
+                "question"
+              ]
+            }
+          }
+        },
+        "required": [
+          "questions"
+        ]
+      }
+    },
+    {
+      "name": "bash",
+      "description": "Execute a bash command (`bash -c`) and return its stdout/stderr. Each call runs in a fresh shell: no state (cwd, variables, functions) persists between calls — pass `workdir` instead of using `cd`. Non-zero exits are reported as `[exit code: N]`. Current harness environment facts are exposed through managed `$DSH_*` variables; inspect them when needed. Commands may run under a file sandbox; a blocked file operation is reported as `[sandbox: file access denied under <mode> mode]` — a policy denial, not a bug in the command; do not retry another way. Long output is truncated to its tail; the full output is saved to a file whose path is reported when available. Set `run_in_background: true` for long-running commands: the call returns a task id immediately; read its output with `task_output` and stop it with `task_kill`. Attempting a command the sandbox may deny is safe and expected: run it and read the marker rather than assuming the denial. When a command is denied and a wider mode would let it succeed, escalate immediately in the same turn — the one sanctioned exception to a denial: retry the exact same command once with `sandbox_permissions` (the narrowest wider mode that suffices) plus a one-sentence `justification`. Do not detour through chat to ask permission first — the approval prompt raised by that retry is how the user consents. If the session states approval prompts are disabled, there is no exception: a denial is final — do not set `sandbox_permissions`. Never escalate speculatively: ground the request in a real denial — normally the one this command just hit; escalating up front is fine only when this session already denied the same access. A rejected escalation is final for that command — stop and explain, never work around it — but it does not forbid attempting or escalating other commands later.",
+      "parameters": {
+        "type": "object",
+        "properties": {
+          "command": {
+            "type": "string",
+            "description": "The bash command to execute."
+          },
+          "description": {
+            "type": "string",
+            "description": "Clear, concise description of what this command does in active voice, 5-10 words (shown in the UI). Examples: \"ls\" → \"List files in current directory\"; \"git status\" → \"Show working tree status\"; \"npm install\" → \"Install package dependencies\"."
+          },
+          "timeoutMs": {
+            "type": "number",
+            "description": "Timeout in milliseconds. The executor applies its configured default and cap, and kills the command on expiry."
+          },
+          "workdir": {
+            "type": "string",
+            "description": "Working directory for this command. Defaults to the session workspace; a relative path is resolved against it."
+          },
+          "run_in_background": {
+            "type": "boolean",
+            "description": "Run in the background and return a task id immediately (collect with task_output, stop with task_kill). No timeout applies."
+          },
+          "sandbox_permissions": {
+            "type": "string",
+            "description": "The wider sandbox mode this command needs. Only valid as a one-shot retry of a command the sandbox just denied; requires justification and user approval.",
+            "enum": [
+              "workspace-write",
+              "danger-full-access"
+            ]
+          },
+          "justification": {
+            "type": "string",
+            "description": "Required with sandbox_permissions: one sentence for the user explaining why this exact command needs the wider access."
+          }
+        },
+        "required": [
+          "command",
+          "description"
+        ]
+      }
+    },
+    {
+      "name": "create_goal",
+      "description": "Create one persisted same-session completion goal when the current direct human request is a long-running objective that should continue across autonomous goal rounds. You may infer that intent without requiring the user to say \"create a goal\". Do not use this for trivial single-turn work. Execution rejects non-human and subagent authority.",
+      "parameters": {
+        "type": "object",
+        "properties": {
+          "objective": {
+            "type": "string",
+            "description": "The concrete completion objective inferred from the direct human request."
+          },
+          "max_goal_rounds": {
+            "type": "number",
+            "description": "Optional positive safe-integer limit on automatic continuation rounds."
+          }
+        },
+        "required": [
+          "objective"
+        ]
+      }
+    },
+    {
+      "name": "edit",
+      "description": "Edit an existing UTF-8 text file by replacing literal text.",
+      "parameters": {
+        "type": "object",
+        "properties": {
+          "file_path": {
+            "type": "string",
+            "description": "Path to edit, resolved by the filesystem backend."
+          },
+          "old_string": {
+            "type": "string",
+            "description": "Literal text to replace. Must match exactly."
+          },
+          "new_string": {
+            "type": "string",
+            "description": "Literal replacement text. Use an empty string to delete the match."
+          },
+          "replace_all": {
+            "type": "boolean",
+            "description": "Replace all matches. Defaults to false; when false, old_string must appear exactly once."
+          },
+          "sandbox_permissions": {
+            "type": "string",
+            "description": "The wider sandbox mode this file operation needs. Only valid as a one-shot retry of an operation the sandbox just denied; requires justification and user approval.",
+            "enum": [
+              "workspace-write",
+              "danger-full-access"
+            ]
+          },
+          "justification": {
+            "type": "string",
+            "description": "Required with sandbox_permissions: one sentence for the user explaining why this exact file operation needs the wider access."
+          }
+        },
+        "required": [
+          "file_path",
+          "old_string",
+          "new_string"
+        ]
+      }
+    },
+    {
+      "name": "exit_plan_mode",
+      "description": "Use only in plan mode. Present your plan for the user's review and, on approval, leave plan mode. Send the COMPLETE plan as markdown, starting with a # heading that names it. The user may approve (carry out the plan from your next step) or keep planning — their feedback comes back in the tool result; revise and present again.",
+      "parameters": {
+        "type": "object",
+        "properties": {
+          "plan": {
+            "type": "string",
+            "description": "The complete plan, as markdown, starting with a # heading that names it."
+          }
+        },
+        "required": [
+          "plan"
+        ]
+      }
+    },
+    {
+      "name": "get_goal",
+      "description": "Read the current same-session goal, including its exact id/revision, objective, phase, completed continuation rounds, round limit, blocker reason when present, and whether another continuation is armed. Call this before updating a goal.",
+      "parameters": {
+        "type": "object",
+        "properties": {}
+      }
+    },
+    {
+      "name": "ralph",
+      "description": "Run a foreground fresh-agent Ralph loop toward one immutable objective. Use only when the direct human explicitly asks for Ralph or fresh-agent iteration. Each round opens a new child with no parent conversation or prior child session; the shared workspace is long-term memory, and only a bounded structured report crosses rounds. The call returns when a worker reports completion or a concrete blocker, or at the round limit. Ordinary long-running same-session work belongs to goal tools.",
+      "parameters": {
+        "type": "object",
+        "properties": {
+          "objective": {
+            "type": "string",
+            "description": "The immutable completion objective for every fresh Ralph round."
+          },
+          "maxRounds": {
+            "type": "number",
+            "description": "Optional positive safe-integer round cap, bounded by the deployment ceiling."
+          }
+        },
+        "required": [
+          "objective"
+        ]
+      }
+    },
+    {
+      "name": "read",
+      "description": "Read a UTF-8 text file and return line-numbered content.",
+      "parameters": {
+        "type": "object",
+        "properties": {
+          "file_path": {
+            "type": "string",
+            "description": "Path to read, resolved by the filesystem backend."
+          },
+          "offset": {
+            "type": "number",
+            "description": "1-based first line to return. Defaults to 1."
+          },
+          "limit": {
+            "type": "number",
+            "description": "Maximum number of lines to return. Defaults to 2000."
+          }
+        },
+        "required": [
+          "file_path"
+        ]
+      }
+    },
+    {
+      "name": "skill",
+      "description": "Load the full instructions for an available skill. Call this with the exact skill name from the session skill catalog before acting on a task that names or clearly matches that skill.",
+      "parameters": {
+        "type": "object",
+        "properties": {
+          "name": {
+            "type": "string",
+            "description": "The exact skill name from the available skills list."
+          }
+        },
+        "required": [
+          "name"
+        ]
+      }
+    },
+    {
+      "name": "subagent",
+      "description": "Delegate a self-contained task to a subagent (a separate agent that works in its own context) and return its final result. Use this to offload focused, independent work — research, a scoped implementation, an analysis — so it does not consume this conversation's context. The subagent runs to completion and you receive only its final answer, not its intermediate steps. Give it a complete, standalone prompt: it does not see this conversation. Set `run_in_background: true` to return a task id; collect with `task_output` and stop with `task_kill`.",
+      "parameters": {
+        "type": "object",
+        "properties": {
+          "description": {
+            "type": "string",
+            "description": "A short (3-5 word) description of the delegated task, for display."
+          },
+          "prompt": {
+            "type": "string",
+            "description": "The complete, self-contained task for the subagent. It does not share this conversation's context, so include everything it needs."
+          },
+          "run_in_background": {
+            "type": "boolean",
+            "description": "Run as a background task and return its id; collect with task_output or stop with task_kill."
+          }
+        },
+        "required": [
+          "description",
+          "prompt"
+        ]
+      }
+    },
+    {
+      "name": "subagent_fork",
+      "description": "Delegate a task to a subagent that inherits this conversation: a child agent seeded with all completed turns so far (it does not see the current in-flight turn), returning only its final result. Use this when the subtask builds on this conversation's context — a follow-up analysis, a review, a continuation — without consuming this conversation's context for the work itself. You receive only its final answer, not its intermediate steps. Set `run_in_background: true` to return a task id; collect with `task_output` and stop with `task_kill`.",
+      "parameters": {
+        "type": "object",
+        "properties": {
+          "description": {
+            "type": "string",
+            "description": "A short (3-5 word) description of the delegated task, for display."
+          },
+          "prompt": {
+            "type": "string",
+            "description": "The task for the subagent. It already sees this conversation's completed turns, so build on them freely and state only what is new."
+          },
+          "run_in_background": {
+            "type": "boolean",
+            "description": "Run as a background task and return its id; collect with task_output or stop with task_kill."
+          }
+        },
+        "required": [
+          "description",
+          "prompt"
+        ]
+      }
+    },
+    {
+      "name": "task_kill",
+      "description": "Request cancellation of a running background task by task id. Returns immediately; the task settles as killed once its work actually stops.",
+      "parameters": {
+        "type": "object",
+        "properties": {
+          "task_id": {
+            "type": "string",
+            "description": "Task id returned by the tool that started the background work."
+          },
+          "reason": {
+            "type": "string",
+            "description": "Optional short reason, recorded in the log and forwarded to the task."
+          }
+        },
+        "required": [
+          "task_id"
+        ]
+      }
+    },
+    {
+      "name": "task_list",
+      "description": "List your background tasks (running and finished) with their ids, kinds, and statuses.",
+      "parameters": {
+        "type": "object",
+        "properties": {}
+      }
+    },
+    {
+      "name": "task_output",
+      "description": "Read a background task. Stream tasks return only output since the previous read; final-output tasks return their result after settlement. Every response ends with `[status: ...]`. Reads are non-blocking unless `wait: true`, which waits up to the configured cap.",
+      "parameters": {
+        "type": "object",
+        "properties": {
+          "task_id": {
+            "type": "string",
+            "description": "Task id returned by the tool that started the background work."
+          },
+          "wait": {
+            "type": "boolean",
+            "description": "Block until the task reaches a terminal status or the timeout expires. A timed-out wait returns [status: running] and leaves the task alive."
+          },
+          "timeout_ms": {
+            "type": "number",
+            "description": "Max wait in milliseconds (only meaningful with wait: true). Defaults to the configured wait timeout; capped by the configured maximum."
+          }
+        },
+        "required": [
+          "task_id"
+        ]
+      }
+    },
+    {
+      "name": "terminal_close",
+      "description": "Close one persistent terminal and wait until its captured owned process tree is gone.",
+      "parameters": {
+        "type": "object",
+        "properties": {
+          "sessionId": {
+            "type": "string",
+            "description": "Terminal session id."
+          }
+        },
+        "required": [
+          "sessionId"
+        ]
+      }
+    },
+    {
+      "name": "terminal_list",
+      "description": "List persistent terminal sessions owned by the current agent.",
+      "parameters": {
+        "type": "object",
+        "properties": {}
+      }
+    },
+    {
+      "name": "terminal_open",
+      "description": "Create a persistent, owner-isolated terminal session from a registered backend type. Use this for shell or REPL state that must survive across tool calls.",
+      "parameters": {
+        "type": "object",
+        "properties": {
+          "type": {
+            "type": "string",
+            "description": "Registered terminal backend type, usually \"shell\"."
+          },
+          "name": {
+            "type": "string",
+            "description": "Optional owner-local display name such as \"main\" or \"gdb\"."
+          },
+          "cwd": {
+            "type": "string",
+            "description": "Initial working directory. Defaults to the deployment workspace root."
+          }
+        },
+        "required": [
+          "type"
+        ]
+      }
+    },
+    {
+      "name": "terminal_read",
+      "description": "Read a bounded page of retained output from a persistent terminal without sending input.",
+      "parameters": {
+        "type": "object",
+        "properties": {
+          "sessionId": {
+            "type": "string",
+            "description": "Terminal session id."
+          },
+          "offset": {
+            "type": "number",
+            "description": "Newest-relative line offset (default 0)."
+          },
+          "count": {
+            "type": "number",
+            "description": "Requested line count (default 500; backend caps apply)."
+          }
+        },
+        "required": [
+          "sessionId"
+        ]
+      }
+    },
+    {
+      "name": "terminal_send",
+      "description": "Send text to a persistent terminal. By default Enter is submitted and the call waits for a prompt, stdin wait, output silence, timeout, or session exit. Background mode returns a task id for task_output/task_kill.",
+      "parameters": {
+        "type": "object",
+        "properties": {
+          "sessionId": {
+            "type": "string",
+            "description": "Terminal session id returned by terminal_open or terminal_list."
+          },
+          "text": {
+            "type": "string",
+            "description": "UTF-8 text to write to the terminal."
+          },
+          "submit": {
+            "type": "boolean",
+            "description": "Submit Enter after text (default true). Set false for control characters or incomplete REPL input."
+          },
+          "run_in_background": {
+            "type": "boolean",
+            "description": "Return a task id immediately; collect with task_output or stop with task_kill."
+          }
+        },
+        "required": [
+          "sessionId",
+          "text"
+        ]
+      }
+    },
+    {
+      "name": "terminal_signal",
+      "description": "Send an allowed signal to the current foreground process group of a persistent terminal.",
+      "parameters": {
+        "type": "object",
+        "properties": {
+          "sessionId": {
+            "type": "string",
+            "description": "Terminal session id."
+          },
+          "signal": {
+            "type": "string",
+            "description": "Signal to deliver. Shell-targeted SIGKILL is rejected; use terminal_close.",
+            "enum": [
+              "SIGINT",
+              "SIGTERM",
+              "SIGKILL",
+              "SIGTSTP",
+              "SIGHUP"
+            ]
+          }
+        },
+        "required": [
+          "sessionId",
+          "signal"
+        ]
+      }
+    },
+    {
+      "name": "todo_write",
+      "description": "Record and update a structured task list for the current work. Send the ENTIRE list every call — it REPLACES the previous list (there are no partial updates, no per-item edits). Use it to plan multi-step work and show progress: add one todo per concrete step before you start. Keep AT MOST ONE todo `in_progress` at a time; while work remains, exactly one active task should be `in_progress`. Mark a todo `completed` the moment it is done (do not batch completions), and allow no `in_progress` item only once all work is complete. Skip the list for trivial single-step tasks. Statuses: `pending` (not started), `in_progress` (being worked on now), `completed` (finished).",
+      "parameters": {
+        "type": "object",
+        "properties": {
+          "todos": {
+            "type": "array",
+            "description": "The COMPLETE task list, replacing any previous list.",
+            "items": {
+              "type": "object",
+              "properties": {
+                "content": {
+                  "type": "string",
+                  "description": "What the task is — a short imperative line."
+                },
+                "status": {
+                  "type": "string",
+                  "description": "pending (not started) | in_progress (now) | completed (done).",
+                  "enum": [
+                    "pending",
+                    "in_progress",
+                    "completed"
+                  ]
+                }
+              },
+              "required": [
+                "content",
+                "status"
+              ]
+            }
+          }
+        },
+        "required": [
+          "todos"
+        ]
+      }
+    },
+    {
+      "name": "update_goal",
+      "description": "Update the exact current goal revision. edit, pause, and resume require a direct top-level human request. During an automatic continuation of the current goal, complete and blocked are also allowed. blocked is rejected before the configured minimum round count; the model remains responsible for judging that the same condition persisted across those rounds and must explain it in blocked_reason.",
+      "parameters": {
+        "type": "object",
+        "properties": {
+          "goal_id": {
+            "type": "string",
+            "description": "Exact id returned by get_goal."
+          },
+          "revision": {
+            "type": "number",
+            "description": "Exact positive revision returned by get_goal."
+          },
+          "action": {
+            "type": "string",
+            "description": "edit | pause | resume | complete | blocked",
+            "enum": [
+              "edit",
+              "pause",
+              "resume",
+              "complete",
+              "blocked"
+            ]
+          },
+          "objective": {
+            "type": "string",
+            "description": "Replacement objective; valid only with action edit."
+          },
+          "max_goal_rounds": {
+            "type": "number",
+            "description": "Replacement cap; valid only with action edit."
+          },
+          "blocked_reason": {
+            "type": "string",
+            "description": "Concrete blocking condition; required only with action blocked."
+          }
+        },
+        "required": [
+          "goal_id",
+          "revision",
+          "action"
+        ]
+      }
+    },
+    {
+      "name": "workflow",
+      "description": "Run a JavaScript workflow script that orchestrates subagents at scale. Use this for work that fans out across many independent pieces — an audit over many files, a migration, multi-angle research, adversarial verification of findings — where you write the orchestration as a script instead of delegating turn by turn.\n\nThe workflow's identity rides the `meta` parameter as JSON: required `name` (short kebab-case) and `description` strings, optional `whenToUse` string and `phases` array (`{title, detail?, provider?, model?}`). The `script` parameter is the plain JavaScript body ONLY (NOT TypeScript, and NO `export const meta` statement — meta is a parameter, not code), running with top-level await; end with `return <value>` — the value must be JSON-serializable and is this tool's result.\n\nScript-body hooks:\n- `agent(prompt, opts?): Promise<any>` — run one subagent to completion. Without `opts.schema` it resolves to the child's final text; with `opts.schema` (an object-rooted JSON Schema using ONLY type/properties/required/additionalProperties/items/enum/const — no oneOf/pattern/format/numeric bounds) it resolves to the validated object. Resolves `null` when the child fails (filter with `.filter(Boolean)`). Other opts: `label` (display), `phase` (progress group), and independent `provider`/`model` LLM target overrides (either may be provided alone). Anything else (`effort`/`isolation`/`agentType`) is rejected loudly.\n- `pipeline(items, ...stages): Promise<any[]>` — run each item through the stages independently with NO barrier between stages (prefer this for multi-stage work). Each stage receives `(prev, item, index)`. An ordinary stage throw drops that ITEM to `null` and skips its remaining stages.\n- `parallel(thunks): Promise<any[]>` — run zero-argument functions concurrently and await ALL of them (a barrier; use only when a stage genuinely needs every prior result together). A throwing thunk resolves to `null`.\n- `phase(title)` — start a progress phase; `log(message)` — narrate progress; `args` — the tool call's `args` input, verbatim.\n\nMisused hooks (bad arguments, unknown options, unsupported schemas, tripped caps) throw errors that ALWAYS kill the script — they never dissolve into a per-item `null`.\n\nConstraints: concurrency and total-agent caps apply; no filesystem, network, timers, or Node.js APIs are provided — the agents do the work, the script only coordinates them. The run executes in the foreground: this call returns when the whole script finishes.",
+      "parameters": {
+        "type": "object",
+        "properties": {
+          "script": {
+            "type": "string",
+            "description": "The plain-JS workflow script body (top-level await allowed; NO `export const meta` statement; end with `return <json-value>`)."
+          },
+          "meta": {
+            "type": "object",
+            "description": "The workflow identity block (plain JSON — never code).",
+            "properties": {
+              "name": {
+                "type": "string",
+                "description": "Short kebab-case workflow name."
+              },
+              "description": {
+                "type": "string",
+                "description": "One-line description of what the workflow does."
+              },
+              "whenToUse": {
+                "type": "string",
+                "description": "Optional guidance on when this workflow applies."
+              },
+              "phases": {
+                "type": "array",
+                "description": "Optional phase declarations matched by phase() calls.",
+                "items": {
+                  "type": "object",
+                  "properties": {
+                    "title": {
+                      "type": "string",
+                      "description": "The phase title phase() calls match by exact string."
+                    },
+                    "detail": {
+                      "type": "string",
+                      "description": "Optional one-line description of the phase."
+                    },
+                    "provider": {
+                      "type": "string",
+                      "description": "Optional provider override this phase is expected to use."
+                    },
+                    "model": {
+                      "type": "string",
+                      "description": "Optional model override this phase is expected to use."
+                    }
+                  },
+                  "required": [
+                    "title"
+                  ]
+                }
+              }
+            },
+            "required": [
+              "name",
+              "description"
+            ]
+          },
+          "args": {
+            "type": "object",
+            "description": "Optional JSON input exposed to the script as the `args` global (wrap a bare list as a field, e.g. {\"files\": [...]})."
+          }
+        },
+        "required": [
+          "script",
+          "meta"
+        ]
+      }
+    },
+    {
+      "name": "write",
+      "description": "Create or fully replace a UTF-8 text file.",
+      "parameters": {
+        "type": "object",
+        "properties": {
+          "file_path": {
+            "type": "string",
+            "description": "Path to write, resolved by the filesystem backend."
+          },
+          "content": {
+            "type": "string",
+            "description": "Full UTF-8 text content to write."
+          },
+          "sandbox_permissions": {
+            "type": "string",
+            "description": "The wider sandbox mode this file operation needs. Only valid as a one-shot retry of an operation the sandbox just denied; requires justification and user approval.",
+            "enum": [
+              "workspace-write",
+              "danger-full-access"
+            ]
+          },
+          "justification": {
+            "type": "string",
+            "description": "Required with sandbox_permissions: one sentence for the user explaining why this exact file operation needs the wider access."
+          }
+        },
+        "required": [
+          "file_path",
+          "content"
+        ]
+      }
+    }
+  ],
+  "changes": []
+}