diff --git a/skills/rig/rig.ts b/skills/rig/rig.ts
index 8650865..c930d6b 100644
--- a/skills/rig/rig.ts
+++ b/skills/rig/rig.ts
@@ -1,10 +1,10 @@
 /**
- * @file skills/rig/rig.ts @last-analyzed b88e1d6 @edit-time 2026-07-25T03:20:42Z
+ * @file skills/rig/rig.ts @last-analyzed 138fb9d @edit-time 2026-07-26T20:52:42Z
  * @purpose Minimal TypeScript multi-agent harness: typed input/output schemas, prompt intents, sub-agent delegation, Copilot SDK runtime
  * @deps @github/copilot-sdk (CopilotClient,RuntimeConnection,approveAll); node:path,url,fs/promises,child_process,util
  * T:Json type null|bool|num|str|Json[]|{[k]:Json}
- * T:Schema type StringSchema|NumberSchema|IntegerSchema|BooleanSchema|NullSchema|UnknownSchema|ArraySchema|ObjectSchema|RecordSchema|EnumSchema|OptionalSchema|NullableSchema [NEW]
- * T:NullableSchema<Inner> type {nullable:true;inner:Inner;description?} accepts inner|null [NEW]
+ * T:Schema type StringSchema|NumberSchema|IntegerSchema|BooleanSchema|NullSchema|UnknownSchema|ArraySchema|ObjectSchema|RecordSchema|EnumSchema|OptionalSchema|NullableSchema
+ * T:NullableSchema<Inner> type {nullable:true;inner:Inner;description?} accepts inner|null
  * T:InferSchema<T> type TS inference from schema descriptor to runtime type
  * T:AgentInputValue<T> type input accepting raw values or PromptIntent/PromptBuilder at any nesting level
  * T:Simplify<T> type flattens intersection types for display
@@ -17,12 +17,15 @@
  * T:AgentAddonContext type context passed to each addon in the chain
  * T:AgentDefinitionFactory type typeof agent (for passing agent constructor as value)
  * T:AgentError class error carrying kind,agent,turn,response,schema,schemaText fields
+ * T:SteeringOptions type {message?:string} options for steering addon [NEW]
+ * T:TimeoutOptions type {timeout:number} options for timeout addon [NEW]
+ * T:AgentRegistration type callback invoked once per unique Agent instance for oncePerAgent [NEW]
  * T:Tool<TArgs> type ToolConfig+name; created by defineTool
  * T:ToolConfig<TArgs> type {description,parameters,handler}
  * T:PromptIntent type declarative placeholder {kind:'bash'|'bashEach'|'read'|'readAll'|'write'|'writeOutput'|'writeInput'|'glob'|'env',…} resolved into prompt text
  * T:PromptBuilder class template-tag result; composes intents+strings into a prompt fragment
  * T:PromptHelpers type shape of exported p object
- * T:PromptVariable<T> type {__rig:'prompt.var';name:string;value:T} named prompt variable [NEW]
+ * T:PromptVariable<T> type {__rig:'prompt.var';name:string;value:T} named prompt variable
  * T:ResponseAnalysisResult type {ok:true;output}|{ok:false;error:AgentError}
  * T:CopilotEngineOptions type CopilotClientOptions minus connection, plus server/token/headers fields
  * T:LaunchOptions type options for launchRigProgram (server,token,headers,cwd,args)
@@ -47,17 +50,17 @@
  * p.readOptional(path,fallback?,opts?) PromptIntent file read declaration; returns fallback (default "") if file absent
  * p.write(path,content,opts?) PromptIntent file write declaration; does NOT expand to path in template — hard-code path in output schema
  * p.writeOutput(field,path,opts?) PromptIntent post-generation write declaration; writes output field value to path
- * p.writeInput(inputPathField,contentOutputField,opts?) PromptIntent post-generation write declaration; writes output field value to the path given by input.<inputPathField> [NEW]
+ * p.writeInput(inputPathField,contentOutputField,opts?) PromptIntent post-generation write declaration; writes output field value to the path given by input.<inputPathField>
  * p.glob(pattern,opts?) PromptIntent glob file-list declaration (not run in-process)
  * p.readAll(paths,opts?) PromptIntent multi-file read declaration; reads all listed paths and concatenates their contents
- * p.readInput(field,opts?) PromptIntent file read declaration using a runtime input field as the path; reads the file at the single path given by input.<field> [NEW]
- * p.readAllInput(field,opts?) PromptIntent multi-file read declaration using a runtime input array field; reads all paths in input.<field> and concatenates their contents [NEW]
- * p.bashEach(template,inputArrayField,opts?) PromptIntent bash-per-element declaration; runs template once per element in input.<inputArrayField>, substituting {} with each element [NEW]
+ * p.readInput(field,opts?) PromptIntent file read declaration using a runtime input field as the path; reads the file at the single path given by input.<field>
+ * p.readAllInput(field,opts?) PromptIntent multi-file read declaration using a runtime input array field; reads all paths in input.<field> and concatenates their contents
+ * p.bashEach(template,inputArrayField,opts?) PromptIntent bash-per-element declaration; runs template once per element in input.<inputArrayField>, substituting {} with each element
  * p.env(name,fallback?,opts?) PromptIntent env var read declaration; returns fallback (default "") if not set
  * p.json(value) string JSON.stringify helper for inlining structured values in prompt templates
- * p.inputField(field) string returns "input.<field>" for explicit, documented reference to a caller-supplied input field in prompt prose [NEW]
- * p.var(name,value) PromptVariable<T> named variable binding for prompt templates [NEW]
- * p.region(language,body) string wraps body in a fenced code block for the given language [NEW]
+ * p.inputField(field) string returns "input.<field>" for explicit, documented reference to a caller-supplied input field in prompt prose
+ * p.var(name,value) PromptVariable<T> named variable binding for prompt templates
+ * p.region(language,body) string wraps body in a fenced code block for the given language
  * F:agent(spec) AgentFn<I,O>; spec={name,description,input,output,prompt,addons,maxTurns}
  * F:copilotEngine(opts?) AgentFactory wrapping CopilotClient+RuntimeConnection
  * F:configureAgent(factory) sets global AgentFactory used by agent() calls at module scope
@@ -68,14 +71,21 @@
  * F:defaultRepairPrompt(spec,err) string re-prompt on parse/validation failure
  * F:toJsonSchema(schema) JsonSchemaObject converts Schema to plain JSON Schema
  * F:debug(category) creates a lazy category-filtered JSONL logger
+ * F:steering(opts?) AgentAddon appends last-turn warning to prompt when model must correct output [NEW]
+ * F:timeout(opts) AgentAddon applies AbortSignal timeout to each turn [NEW]
+ * F:oncePerAgent(register) AgentAddon runs registration callback exactly once per unique Agent instance [NEW]
+ * V:addons {repair,steering,timeout,oncePerAgent} convenience object collecting all built-in addon factories [NEW]
  * addon:repair re-prompts on JSON/schema failure up to maxTurns (built-in via defaultRepairPrompt)
+ * addon:steering appends warning on last turn so model knows it must correct output now [NEW]
+ * addon:timeout wraps each turn with AbortSignal from TimeoutOptions.timeout ms [NEW]
+ * addon:oncePerAgent runs AgentRegistration callback once per unique Agent (e.g. tool registration) [NEW]
  * INV:shape-descriptors JS values promote to schemas ("" → string, 0 → number, [""] → string[])
  * INV:optional-key trailing _ on spec key means optional field
  * INV:prompt-intents p.* are declarative placeholders resolved into prompt text, never executed
  * INV:repair-contract addon intercepts AgentError, appends error to prompt, retries up to maxTurns
  * INV:json-extraction model response is parsed directly as JSON; fallback strategies: extract ```json fenced block, then extract first balanced {…}/[…] value
  * INV:schema-symbol Schema objects carry private SCHEMA_SYMBOL; toJSON serializes via serializeSchema
- * INV:p-write-no-path p.write() contributes a write instruction to the prompt; it does NOT return the path; hard-code path in agent output [NEW]
+ * INV:p-write-no-path p.write() contributes a write instruction to the prompt; it does NOT return the path; hard-code path in agent output
  */
 import { basename, dirname, isAbsolute, resolve } from "node:path";
 import { fileURLToPath, pathToFileURL } from "node:url";