From 5a557a642af3e026bef67e7d78c883db7195e41e Mon Sep 17 00:00:00 2001 From: mikael-lovqvists-claude-agent Date: Sat, 7 Mar 2026 20:01:54 +0000 Subject: [PATCH] Initial commit Supervised action bridge between Claude Code and the host system. Server accepts structured action requests, applies per-action policies (auto-accept/auto-deny/queue), and executes approved actions via typed handlers. Client provides CLI and module interfaces for calling the API. Co-Authored-By: Claude Sonnet 4.6 --- .gitignore | 1 + README.md | 66 ++++ client/conduit.js | 22 ++ client/index.js | 51 +++ package-lock.json | 826 ++++++++++++++++++++++++++++++++++++++++++++++ package.json | 13 + server/actions.js | 61 ++++ server/index.js | 127 +++++++ server/queue.js | 41 +++ 9 files changed, 1208 insertions(+) create mode 100644 .gitignore create mode 100644 README.md create mode 100644 client/conduit.js create mode 100644 client/index.js create mode 100644 package-lock.json create mode 100644 package.json create mode 100644 server/actions.js create mode 100644 server/index.js create mode 100644 server/queue.js diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..c2658d7 --- /dev/null +++ b/.gitignore @@ -0,0 +1 @@ +node_modules/ diff --git a/README.md b/README.md new file mode 100644 index 0000000..5460f95 --- /dev/null +++ b/README.md @@ -0,0 +1,66 @@ +# claude-code-conduit + +A supervised action bridge between Claude Code and the host system. + +Claude requests structured actions. The server applies per-action policies: +- **auto-accept** — executed immediately (e.g. open a file in editor) +- **auto-deny** — rejected immediately +- **queue** — held for user approval (e.g. open a browser URL) + +## Setup + +```bash +npm install +``` + +## Running the server + +```bash +node server/index.js +# or +CONDUIT_PORT=3333 CONDUIT_ROOT=/workspace node server/index.js +``` + +## Using the CLI client + +```bash +# List available actions +node client/index.js list-actions + +# Open a file in the editor (auto-accepted) +node client/index.js edit-file filename=/workspace/myfile.js + +# Open a URL (queued for user approval) +node client/index.js open-browser url=https://example.com +``` + +When a queued action is submitted, the server prints the approve/deny URLs to stdout: + +``` +[QUEUE] New request #a1b2c3d4 + Action: open-browser + Params: {"url":"https://example.com"} + Approve: POST /queue/a1b2c3d4.../approve + Deny: POST /queue/a1b2c3d4.../deny +``` + +User approves via: +```bash +curl -X POST http://localhost:3333/queue//approve +``` + +## Environment variables + +| Variable | Default | Description | +|----------|---------|-------------| +| `CONDUIT_PORT` | `3333` | Server port | +| `CONDUIT_ROOT` | `/workspace` | Workspace root for path resolution | +| `CONDUIT_URL` | `http://localhost:3333` | Server URL (client-side) | + +## Adding actions + +Edit `server/actions.js`. Each action needs: +- `description` — shown in list-actions +- `params` — array of `{ name, required, type }` +- `policy` — `"auto-accept"` | `"auto-deny"` | `"queue"` +- `handler(params, helpers)` — async function that performs the action diff --git a/client/conduit.js b/client/conduit.js new file mode 100644 index 0000000..adcc18e --- /dev/null +++ b/client/conduit.js @@ -0,0 +1,22 @@ +// Conduit client module — import this when using conduit programmatically. +// Designed for use by Claude or other tools that want to call conduit actions. + +const BASE_URL = process.env.CONDUIT_URL || "http://localhost:3333"; + +export async function callAction(action, params = {}) { + const res = await fetch(`${BASE_URL}/action`, { + method: "POST", + headers: { "Content-Type": "application/json" }, + body: JSON.stringify({ action, ...params }), + }); + return res.json(); +} + +export async function listActions() { + return callAction("list-actions"); +} + +export async function getQueue() { + const res = await fetch(`${BASE_URL}/queue`); + return res.json(); +} diff --git a/client/index.js b/client/index.js new file mode 100644 index 0000000..69e5d6f --- /dev/null +++ b/client/index.js @@ -0,0 +1,51 @@ +#!/usr/bin/env node +// Conduit client — thin CLI wrapper for Claude to call the conduit server. +// Usage: +// node client/index.js [key=value ...] +// node client/index.js list-actions +// node client/index.js edit-file filename=/workspace/foo.js + +const BASE_URL = process.env.CONDUIT_URL || "http://localhost:3333"; + +async function callAction(action, params = {}) { + const res = await fetch(`${BASE_URL}/action`, { + method: "POST", + headers: { "Content-Type": "application/json" }, + body: JSON.stringify({ action, ...params }), + }); + + const body = await res.json(); + return { status: res.status, body }; +} + +function parseArgs(argv) { + const [, , action, ...rest] = argv; + const params = {}; + for (const arg of rest) { + const eq = arg.indexOf("="); + if (eq === -1) { + console.error(`Bad argument (expected key=value): ${arg}`); + process.exit(1); + } + params[arg.slice(0, eq)] = arg.slice(eq + 1); + } + return { action, params }; +} + +async function main() { + if (process.argv.length < 3) { + console.error("Usage: conduit [key=value ...]"); + process.exit(1); + } + + const { action, params } = parseArgs(process.argv); + const { status, body } = await callAction(action, params); + + console.log(JSON.stringify(body, null, 2)); + process.exit(status >= 400 ? 1 : 0); +} + +main().catch((err) => { + console.error("Conduit error:", err.message); + process.exit(1); +}); diff --git a/package-lock.json b/package-lock.json new file mode 100644 index 0000000..2b734da --- /dev/null +++ b/package-lock.json @@ -0,0 +1,826 @@ +{ + "name": "claude-code-conduit", + "version": "0.1.0", + "lockfileVersion": 3, + "requires": true, + "packages": { + "": { + "name": "claude-code-conduit", + "version": "0.1.0", + "dependencies": { + "express": "^5.2.1" + } + }, + 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0000000..7f03944 --- /dev/null +++ b/package.json @@ -0,0 +1,13 @@ +{ + "name": "claude-code-conduit", + "version": "0.1.0", + "description": "A supervised action bridge between Claude Code and the host system", + "type": "module", + "scripts": { + "server": "node server/index.js", + "client": "node client/index.js" + }, + "dependencies": { + "express": "^5.2.1" + } +} diff --git a/server/actions.js b/server/actions.js new file mode 100644 index 0000000..fcf83e3 --- /dev/null +++ b/server/actions.js @@ -0,0 +1,61 @@ +// Action registry — defines all available actions, their parameters, and policies. +// policy: "auto-accept" | "auto-deny" | "queue" + +export const actions = { + "list-actions": { + description: "List all available actions and their definitions", + params: [], + policy: "auto-accept", + handler: async () => { + return Object.entries(actions).map(([name, def]) => ({ + action: name, + description: def.description, + params: def.params, + policy: def.policy, + })); + }, + }, + + "edit-file": { + description: "Open a file in the editor", + params: [{ name: "filename", required: true, type: "path" }], + policy: "auto-accept", + handler: async ({ filename }, { resolvePath, exec }) => { + const resolved = resolvePath(filename); + await exec("xdg-open", [resolved]); + return { opened: resolved }; + }, + }, + + "open-directory": { + description: "Open a directory in the file manager", + params: [{ name: "path", required: true, type: "path" }], + policy: "auto-accept", + handler: async ({ path }, { resolvePath, exec }) => { + const resolved = resolvePath(path); + await exec("xdg-open", [resolved]); + return { opened: resolved }; + }, + }, + + "open-browser": { + description: "Open a URL in the web browser", + params: [{ name: "url", required: true, type: "string" }], + policy: "queue", + handler: async ({ url }, { exec }) => { + await exec("xdg-open", [url]); + return { opened: url }; + }, + }, + + "open-terminal": { + description: "Open a terminal in a given directory", + params: [{ name: "path", required: false, type: "path" }], + policy: "queue", + handler: async ({ path }, { resolvePath, exec }) => { + const resolved = path ? resolvePath(path) : process.env.HOME; + await exec("xdg-open", [resolved]); + return { opened: resolved }; + }, + }, +}; diff --git a/server/index.js b/server/index.js new file mode 100644 index 0000000..9a79a43 --- /dev/null +++ b/server/index.js @@ -0,0 +1,127 @@ +import express from "express"; +import { spawnSync } from "child_process"; +import path from "path"; +import { actions } from "./actions.js"; +import { enqueue, getEntry, listPending, resolve } from "./queue.js"; + +const PORT = process.env.CONDUIT_PORT || 3015; +const WORKSPACE_ROOT = process.env.CONDUIT_ROOT || "/workspace"; + +const app = express(); +app.use(express.json()); + +// Resolve a path param relative to WORKSPACE_ROOT, preventing traversal. +function resolvePath(userPath) { + const resolved = path.resolve(WORKSPACE_ROOT, userPath.replace(/^\//, "")); + if (!resolved.startsWith(WORKSPACE_ROOT)) { + throw new Error(`Path escapes workspace root: ${userPath}`); + } + return resolved; +} + +// Execute a binary with an argument list — no shell interpolation. +function exec(bin, args = []) { + return new Promise((resolve, reject) => { + const result = spawnSync(bin, args, { stdio: "inherit" }); + if (result.error) { + reject(result.error); + } else { + resolve(result.status); + } + }); +} + +const helpers = { resolvePath, exec }; + +// Validate that all required params are present. +function validateParams(actionDef, params) { + const errors = []; + for (const p of actionDef.params) { + if (p.required && (params[p.name] === undefined || params[p.name] === null)) { + errors.push(`Missing required param: ${p.name}`); + } + } + return errors; +} + +// POST /action — main entry point +app.post("/action", async (req, res) => { + const { action, ...params } = req.body ?? {}; + + if (!action) { + return res.status(400).json({ error: "Missing 'action' field" }); + } + + const def = actions[action]; + if (!def) { + return res.status(404).json({ error: `Unknown action: ${action}` }); + } + + const errors = validateParams(def, params); + if (errors.length) { + return res.status(400).json({ error: "Invalid params", details: errors }); + } + + if (def.policy === "auto-deny") { + return res.status(403).json({ status: "denied", reason: "Policy: auto-deny" }); + } + + if (def.policy === "auto-accept") { + try { + const result = await def.handler(params, helpers); + return res.json({ status: "accepted", result }); + } catch (err) { + return res.status(500).json({ status: "error", error: err.message }); + } + } + + if (def.policy === "queue") { + const id = enqueue(action, params); + return res.status(202).json({ status: "queued", id }); + } +}); + +// GET /queue — list pending items +app.get("/queue", (req, res) => { + res.json(listPending()); +}); + +// POST /queue/:id/approve — user approves a queued action +app.post("/queue/:id/approve", async (req, res) => { + const entry = getEntry(req.params.id); + if (!entry) { + return res.status(404).json({ error: "Not found" }); + } + if (entry.status !== "pending") { + return res.status(409).json({ error: "Already resolved" }); + } + + resolve(req.params.id, "approved"); + + const def = actions[entry.action]; + try { + const result = await def.handler(entry.params, helpers); + res.json({ status: "approved", result }); + } catch (err) { + res.status(500).json({ status: "error", error: err.message }); + } +}); + +// POST /queue/:id/deny — user denies a queued action +app.post("/queue/:id/deny", (req, res) => { + const entry = getEntry(req.params.id); + if (!entry) { + return res.status(404).json({ error: "Not found" }); + } + if (entry.status !== "pending") { + return res.status(409).json({ error: "Already resolved" }); + } + + resolve(req.params.id, "denied"); + res.json({ status: "denied" }); +}); + +app.listen(PORT, () => { + console.log(`claude-code-conduit server running on port ${PORT}`); + console.log(`Workspace root: ${WORKSPACE_ROOT}`); +}); diff --git a/server/queue.js b/server/queue.js new file mode 100644 index 0000000..28fed24 --- /dev/null +++ b/server/queue.js @@ -0,0 +1,41 @@ +// Pending queue — holds actions awaiting user approval. + +import { randomUUID } from "crypto"; + +const pending = new Map(); + +export function enqueue(action, params) { + const id = randomUUID(); + const entry = { + id, + action, + params, + status: "pending", + createdAt: new Date().toISOString(), + }; + pending.set(id, entry); + console.log(`\n[QUEUE] New request #${id.slice(0, 8)}`); + console.log(` Action: ${action}`); + console.log(` Params: ${JSON.stringify(params)}`); + console.log(` Approve: POST /queue/${id}/approve`); + console.log(` Deny: POST /queue/${id}/deny\n`); + return id; +} + +export function getEntry(id) { + return pending.get(id) ?? null; +} + +export function listPending() { + return [...pending.values()].filter((e) => e.status === "pending"); +} + +export function resolve(id, decision) { + const entry = pending.get(id); + if (!entry) { + return null; + } + entry.status = decision; // "approved" | "denied" + entry.resolvedAt = new Date().toISOString(); + return entry; +}