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tinyagent-ts

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Modern TypeScript framework for building AI agents with pluggable tools and ReAct reasoning

github.com/alchemiststudiosDOTai/tinyagent-ts

alchemiststudiosDOTai/tinyagent-ts

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"use strict";var e=require("zod"),a=require("fs"),n=require("child_process"),i=require("crypto"),t=require("readline"),o=require("execa"),r=require("path"),s=require("tty"),c=require("util"),p=require("os"),l=require("buffer"),u=require("string_decoder"),d=require("node:zlib"),m=require("node:events"),f=require("url"),h=require("node:path"),v=require("node:fs"),x=require("node:http"),b=require("querystring"),g=require("node:net"),y=require("stream");class w extends Error{statusCode;constructor(e,a){super(e),this.statusCode=a,this.name="ModelError"}}class k extends w{constructor(e="Model request was aborted"){super(e),this.name="ModelAbortError"}}class j{baseUrl="https://openrouter.ai/api/v1/chat/completions";getName(){return"openrouter"}async chat(e,a,n){if(n?.aborted)throw new k;try{const i=await fetch(this.baseUrl,{method:"POST",headers:{Authorization:`Bearer ${a.apiKey}`,"Content-Type":"application/json","HTTP-Referer":"https://github.com/yourusername/tinyagent-ts","X-Title":"TinyAgent-TS"},signal:n,body:JSON.stringify({model:a.model,messages:e})});if(!i.ok){let e={message:"Failed to parse error response"};try{e=await i.json()}catch(e){}throw new w(`OpenRouter API error: ${i.status} ${i.statusText}. Details: ${JSON.stringify(e)}`,i.status)}const t=await i.json();return{content:t.choices[0]?.message?.content?.trim()??"",usage:t.usage?{promptTokens:t.usage.prompt_tokens,completionTokens:t.usage.completion_tokens,totalTokens:t.usage.total_tokens}:void 0}}catch(e){if(e instanceof w)throw e;if(e instanceof Error&&"AbortError"===e.name)throw new k;throw new w(`Failed to communicate with OpenRouter: ${e instanceof Error?e.message:String(e)}`)}}}class E{providers=new Map;config;constructor(e={}){if(this.config={defaultProvider:e.defaultProvider||"openrouter",defaultModel:e.defaultModel||"openai/gpt-4o-mini",apiKey:e.apiKey||process.env.OPENROUTER_API_KEY||"",maxRetries:e.maxRetries||3,retryDelay:e.retryDelay||1e3},!this.config.apiKey)throw new w("API key is required. Set OPENROUTER_API_KEY environment variable or provide apiKey in config.");this.registerProvider("openrouter",new j)}registerProvider(e,a){this.providers.set(e,a)}getProvider(e){return this.providers.get(e)}async chat(e,a={}){const n=a.provider||this.config.defaultProvider,i=this.getProvider(n);if(!i)throw new w(`Unknown provider: ${n}`);const t={model:a.model||this.config.defaultModel,apiKey:a.apiKey||this.config.apiKey,maxRetries:a.maxRetries||this.config.maxRetries},o=t.maxRetries||0;let r;for(let n=0;n<=o;n++)try{return await i.chat(e,t,a.abortSignal)}catch(e){if(r=e instanceof Error?e:new Error(String(e)),"ModelAbortError"===r.name||"AbortError"===r.name||e instanceof w&&401===e.statusCode)throw r;if(n===o)break;this.config.retryDelay>0&&await new Promise((e=>setTimeout(e,this.config.retryDelay)))}throw r}updateConfig(e){this.config={...this.config,...e}}getConfig(){return{...this.config}}}class S{task="";steps=[];setTask(e){this.task=e}getTask(){return this.task}clear(){this.steps=[],this.task=""}addThought(e){this.steps.push({type:"thought",text:e,timestamp:new Date})}addAction(e){this.steps.push({...e,timestamp:new Date})}addObservation(e){this.steps.push({type:"observation",text:e,timestamp:new Date})}addReflexion(e){this.steps.push({type:"reflexion",text:e,timestamp:new Date})}getSteps(){return[...this.steps]}getLastArgValue(e){for(let a=this.steps.length-1;a>=0;a--){const n=this.steps[a];if("action"===n.type&&"json"===n.mode&&n.args&&e in n.args)return n.args[e]}}toMessages(e){const a=[];e&&a.push({role:"system",content:e}),this.task&&a.push({role:"user",content:this.task});for(const e of this.steps)switch(e.type){case"thought":a.push({role:"assistant",content:`Thought: ${e.text}`});break;case"reflexion":a.push({role:"assistant",content:`Reflexion: ${e.text}`});break;case"action":const n=e;if("code"===n.mode)a.push({role:"assistant",content:`Action:\n\`\`\`ts\n${n.text}\n\`\`\``});else{const e=JSON.stringify({tool:n.tool,args:n.args});a.push({role:"assistant",content:`Action: ${e}`})}break;case"observation":a.push({role:"assistant",content:`Observation: ${e.text}`})}return a}}function A(e){const a=e.match(/Reflect(?:ion|xion)?:([\s\S]*?)(?=\n(?:Thought|Action):|$)/i),n=a?a[1].trim():void 0,i=e.match(/Thought:(.*?)(?:\nAction:|$)/s),t=i?i[1].trim():"",o=(e.split(/\nAction:/s)[1]??"").trim();try{if(o.startsWith("{")&&o.endsWith("}")){const e=JSON.parse(o);if("string"==typeof e.tool&&"object"==typeof e.args){return{thought:t,action:{type:"action",mode:"json",tool:e.tool,args:e.args,text:o},reflexion:n}}}}catch{}const r=o.match(/{\s*"tool"\s*:\s*"([^"]+)".*}/);if(r)try{const e=r[0],a=JSON.parse(e);if("string"==typeof a.tool&&"object"==typeof a.args){return{thought:t,action:{type:"action",mode:"json",tool:a.tool,args:a.args,text:e},reflexion:n}}}catch{}if(o.startsWith("```")){const e=o.match(/```(?:\w+)?\n([\s\S]*?)```/);return{thought:t,action:{type:"action",mode:"code",tool:"code",text:e?e[1].trim():o},reflexion:n}}if(o){return{thought:t,action:{type:"action",mode:"code",tool:"code",text:o},reflexion:n}}return{thought:t,reflexion:n}}const C=e.z.object({answer:e.z.unknown().refine((e=>null!=e),{message:"Answer cannot be undefined or null"})});function O(a){try{return C.parse(a)}catch(a){if(a instanceof e.z.ZodError)throw new Error(`Invalid final answer structure: ${a.errors.map((e=>e.message)).join(", ")}`);throw a}}class T{modelManager;state;tools=new Map;constructor(e){this.modelManager=e,this.state=new S}registerTool(e){this.tools.set(e.name,e)}unregisterTool(e){this.tools.delete(e)}getTools(){return Array.from(this.tools.values())}async execute(e,a,n={},i={}){const{maxSteps:t=5,enableReflexion:o=!0,enableTrace:r=!1,onStep:s,onComplete:c}=n;let p;this.state.clear(),this.state.setTask(e);let l=!1;try{for(let e=0;e<t;e++){if(i.abortSignal?.aborted)throw new 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tool: ${n.action.tool}`}catch(e){t=e instanceof Error?e.message:String(e)}this.state.addObservation(t),r&&console.log(`Observation: ${t}`),s&&s({type:"observation",text:t})}if(o&&n.action){const e=this.state.toMessages(a);if(e.push({role:"user",content:"Reflect:"}),i.abortSignal?.aborted)throw new Error("ReAct execution was aborted");const n=A((await this.modelManager.chat(e,{model:i.model,abortSignal:i.abortSignal})).content);if(n.reflexion&&(this.state.addReflexion(n.reflexion),r&&console.log(`Reflexion: ${n.reflexion}`),s&&s({type:"reflexion",text:n.reflexion})),n.action){if("final_answer"===n.action.tool){l||console.warn("final_answer called before any other tool"),p=n.action.args;const e=JSON.stringify(p);this.state.addObservation(e),r&&console.log(`Observation: ${e}`),s&&s({type:"observation",text:e});break}const e=this.tools.get(n.action.tool);let a="";try{if(e){const t=await e.execute(n.action.args||{},i.abortSignal);l=!0,a=JSON.stringify(t)}else a=`Unknown tool: ${n.action.tool}`}catch(e){a=e instanceof Error?e.message:String(e)}n.thought&&this.state.addThought(n.thought),this.state.addAction(n.action),this.state.addObservation(a),r&&(n.thought&&console.log(`Thought: ${n.thought}`),console.log(`Action: ${n.action.tool}(${JSON.stringify(n.action.args)})`),console.log(`Observation: ${a}`)),s&&(n.thought&&s({type:"thought",text:n.thought}),s(n.action),s({type:"observation",text:a}))}else n.thought&&(this.state.addThought(n.thought),r&&console.log(`Thought: ${n.thought}`),s&&s({type:"thought",text:n.thought}))}}p=await this.enforceFinalAnswer(p,a,i);try{p=O(p)}catch(e){throw new Error(`Final answer validation failed: ${e instanceof Error?e.message:String(e)}`)}const e={success:!0,steps:this.state.getSteps(),finalAnswer:p};return c&&c(e),e}catch(e){const a={success:!1,error:e instanceof Error?e:new Error(String(e)),steps:this.state.getSteps(),finalAnswer:p};return c&&c(a),a}}async enforceFinalAnswer(e,a,n){if(void 0!==e)return e;console.warn("ReAct loop completed without final_answer tool call. Forcing final answer generation.");const i=this.state.toMessages(a);i.push({role:"user",content:"You must provide a final answer now using the final_answer tool. Summarize your findings and provide a conclusive response."});try{const e=await this.modelManager.chat(i,{model:n.model,abortSignal:n.abortSignal}),a=A(e.content);if(a.action&&"final_answer"===a.action.tool){const e=a.action.args;return this.state.addThought(a.thought||"Providing final answer"),this.state.addAction(a.action),this.state.addObservation(JSON.stringify(e)),e}{const a=this.state.getSteps().filter((e=>"observation"===e.type));let n="Task completed";for(let e=a.length-1;e>=0;e--){const i=a[e];if(i.text&&!i.text.startsWith("Action:")&&!i.text.startsWith('{"answer":'))try{const e=JSON.parse(i.text);if("string"==typeof e){n=e.match(/^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/i)?`The generated UUID is: ${e}`:e;break}if(e&&"object"==typeof e){n=JSON.stringify(e);break}}catch{if(i.text.length>10&&!i.text.includes("Unknown tool")){n=i.text;break}}}"Task completed"===n&&e.content&&(n=e.content);const i={answer:n};this.state.addThought("Providing final answer based on previous results");const t={type:"action",mode:"json",tool:"final_answer",args:i,text:JSON.stringify({tool:"final_answer",args:i})};return this.state.addAction(t),this.state.addObservation(JSON.stringify(i)),i}}catch(e){return console.warn("Failed to force final answer:",e),{answer:"Task completed but final answer generation failed"}}}getState(){return this.state}reset(){this.state.clear()}}class _{validateArgs(e){return this.schema.parse(e)}success(e,a){return{success:!0,data:e,metadata:a}}error(e,a){return{success:!1,error:e,metadata:a}}}class P{tools=new Map;metadata=new Map;register(e){if(this.tools.has(e.name))throw new Error(`Tool with name '${e.name}' is already registered`);this.tools.set(e.name,e),this.metadata.set(e.name,{name:e.name,description:e.description,schema:e.schema})}unregister(e){this.tools.delete(e),this.metadata.delete(e)}get(e){return this.tools.get(e)}getAll(){return Array.from(this.tools.values())}getByCategory(e){const a=[];for(const[n,i]of 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l=o+this.iconv.decode(a.slice(i,s),"ascii");n+=this.iconv.decode(e.from(l,"base64"),"utf16-be")}a[s]!=p&&s--,i=s+1,t=!1,o=""}}else a[s]==c&&(n+=this.iconv.decode(a.slice(i,s),"ascii"),i=s+1,t=!0);if(t){var u=(l=o+this.iconv.decode(a.slice(i),"ascii")).length-l.length%8;o=l.slice(u),l=l.slice(0,u),n+=this.iconv.decode(e.from(l,"base64"),"utf16-be")}else n+=this.iconv.decode(a.slice(i),"ascii");return this.inBase64=t,this.base64Accum=o,n},t.prototype.end=function(){var a="";return this.inBase64&&this.base64Accum.length>0&&(a=this.iconv.decode(e.from(this.base64Accum,"base64"),"utf16-be")),this.inBase64=!1,this.base64Accum="",a},ha.utf7imap=u,u.prototype.encoder=d,u.prototype.decoder=m,u.prototype.bomAware=!0,d.prototype.write=function(a){for(var n=this.inBase64,i=this.base64Accum,t=this.base64AccumIdx,o=e.alloc(5*a.length+10),r=0,s=0;s<a.length;s++){var c=a.charCodeAt(s);32<=c&&c<=126?(n&&(t>0&&(r+=o.write(i.slice(0,t).toString("base64").replace(/\//g,",").replace(/=+$/,""),r),t=0),o[r++]=p,n=!1),n||(o[r++]=c,c===l&&(o[r++]=p))):(n||(o[r++]=l,n=!0),n&&(i[t++]=c>>8,i[t++]=255&c,t==i.length&&(r+=o.write(i.toString("base64").replace(/\//g,","),r),t=0)))}return this.inBase64=n,this.base64AccumIdx=t,o.slice(0,r)},d.prototype.end=function(){var a=e.alloc(10),n=0;return this.inBase64&&(this.base64AccumIdx>0&&(n+=a.write(this.base64Accum.slice(0,this.base64AccumIdx).toString("base64").replace(/\//g,",").replace(/=+$/,""),n),this.base64AccumIdx=0),a[n++]=p,this.inBase64=!1),a.slice(0,n)};var f=r.slice();return f[",".charCodeAt(0)]=!0,m.prototype.write=function(a){for(var n="",i=0,t=this.inBase64,o=this.base64Accum,r=0;r<a.length;r++)if(t){if(!f[a[r]]){if(r==i&&a[r]==p)n+="&";else{var s=o+this.iconv.decode(a.slice(i,r),"ascii").replace(/,/g,"/");n+=this.iconv.decode(e.from(s,"base64"),"utf16-be")}a[r]!=p&&r--,i=r+1,t=!1,o=""}}else a[r]==l&&(n+=this.iconv.decode(a.slice(i,r),"ascii"),i=r+1,t=!0);if(t){var c=(s=o+this.iconv.decode(a.slice(i),"ascii").replace(/,/g,"/")).length-s.length%8;o=s.slice(c),s=s.slice(0,c),n+=this.iconv.decode(e.from(s,"base64"),"utf16-be")}else n+=this.iconv.decode(a.slice(i),"ascii");return this.inBase64=t,this.base64Accum=o,n},m.prototype.end=function(){var a="";return this.inBase64&&this.base64Accum.length>0&&(a=this.iconv.decode(e.from(this.base64Accum,"base64"),"utf16-be")),this.inBase64=!1,this.base64Accum="",a},ha}var xa,ba,ga,ya,wa,ka={};function ja(){if(xa)return ka;xa=1;var e=ea().Buffer;function a(a,n){if(!a)throw new Error("SBCS codec is called without the data.");if(!a.chars||128!==a.chars.length&&256!==a.chars.length)throw new Error("Encoding '"+a.type+"' has incorrect 'chars' (must be of len 128 or 256)");if(128===a.chars.length){for(var i="",t=0;