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feat(coding-agent): codemode and MCP

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This adds codemode and MCP support to pi. Codemode (packages/codemode) runs
model-written JavaScript in a QuickJS wasm VM inside a worker. From there the
script calls pi's tools as async functions, uses a per-session store, and can
read the model catalog and run classifiers. The codemode tool in coding-agent
is compatible with Codex's exec tool, and codemode.mode works like Codex's
tool modes (on or only). Large results are written to a JSON temp file. MCP
(packages/mcp) is a standalone client for stdio and streamable HTTP servers,
with OAuth.

The core only gets general mechanisms; codemode, tool_search and MCP are
built-in extensions that use them. Other extensions can replace these
built-ins. Tools declare an exposure: direct, model-only, codemode, deferred
or hidden. prepareLoadout() lets an orchestrating tool change which tool
declarations the model sees. ctx.executeTool() runs nested calls through
validation and the tool_call/tool_result hooks. Those calls emit events with
parentToolCallId and are recorded as bounded nestedCalls on the parent
result, which compaction and HTML export use. Tools can also return
structuredContent with an outputSchema, and can report errors with isError
instead of throwing. MCP servers come from mcp.json (global, or per project
after the project is trusted) or from pi.registerMcpServer(). They are
managed with /mcp and pi mcp list|login|logout, and their runtimes load on
first use.

Closes #10040
This commit is contained in:
Armin Ronacher 2026-09-29 09:12:50 +02:00
parent b485fa3128
commit 8562bcf66a
143 changed files with 17620 additions and 225 deletions
Download patch file Download diff file Expand all files Collapse all files

7
scripts/build-coding-agent-bundle.mjs
View file

@ -147,6 +147,7 @@ for (const entry of [
join(codingAgentDistDir, "index.js"),
join(codingAgentDistDir, "rpc-entry.js"),
join(codingAgentDistDir, "utils", "image-resize-worker.js"),
join(codingAgentDistDir, "extensions", "codemode", "worker.js"),
join(aiDistDir, "api", "bedrock-converse-stream.js"),
join(aiDistDir, "auth", "oauth", "anthropic.js"),
]) {
@ -174,6 +175,7 @@ const mainResult = await build({
const bedrockLoaderOutput = findContainingOutput(mainResult.metafile, "packages/ai/dist/api/bedrock-converse-stream.lazy.js");
const oauthLoaderOutput = findContainingOutput(mainResult.metafile, "packages/ai/dist/auth/oauth/load.js");
const imageResizeOutput = findContainingOutput(mainResult.metafile, "packages/coding-agent/dist/utils/image-resize.js");
const configOutput = findContainingOutput(mainResult.metafile, "packages/coding-agent/dist/config.js");
if (dirname(bedrockLoaderOutput) !== dirname(oauthLoaderOutput)) {
throw new Error("Bedrock and OAuth lazy loaders were emitted into different directories");
}
@ -187,6 +189,7 @@ const lazyResult = await build({
entryPoints: {
anthropic: join(aiDistDir, "auth", "oauth", "anthropic.js"),
"bedrock-converse-stream": join(aiDistDir, "api", "bedrock-converse-stream.js"),
"codemode-worker": join(codingAgentDistDir, "extensions", "codemode", "worker.js"),
"github-copilot": join(aiDistDir, "auth", "oauth", "github-copilot.js"),
"image-resize-worker": join(codingAgentDistDir, "utils", "image-resize-worker.js"),
"kimi-coding": join(aiDistDir, "auth", "oauth", "kimi-coding.js"),
@ -204,6 +207,10 @@ const imageResizeWorkerOutput = resolve(dirname(bedrockLoaderOutput), "image-res
if (dirname(imageResizeOutput) !== dirname(imageResizeWorkerOutput)) {
throw new Error("Image resize implementation and worker were emitted into different directories");
}
// getCodemodeWorkerUrl() in config.ts resolves the worker next to its own chunk.
if (dirname(configOutput) !== dirname(bedrockLoaderOutput)) {
throw new Error("config.ts and the codemode worker were emitted into different directories");
}
validateExternalImports([mainResult.metafile, lazyResult.metafile]);
const cliLauncher = `#!/usr/bin/env node