Refactor server config: single --config flag replaces --secrets/--mail-perms

- New server/config.mjs loads config.json, resolves secrets path relative to config dir, returns users/smtp/mail_perms_path/bind/port - server/secrets.mjs removed (logic absorbed into config.mjs) - smtp moves from secrets.json to config.json - secrets.json now contains only users (pure credentials) - config.example.json added as reference template - .gitignore/.npmignore updated to cover config.json and mail-perms.json - README updated with new setup and flags Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Support wildcard topic in mail permissions
2026-03-17 23:16:30 +00:00 · 2026-03-17 23:00:40 +00:00 · 2026-03-17 22:58:00 +00:00 · 2026-03-17 22:46:56 +00:00 · 2026-03-17 22:41:09 +00:00 · 2026-03-17 22:39:14 +00:00
12 changed files with 301 additions and 876 deletions
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,5 @@
 node_modules/
 secrets.json
+config.json
+mail-perms.json
+package-lock.json
--- a/.npmignore
+++ b/.npmignore
@@ -1,2 +1,4 @@
 secrets.json
 filtered-secrets.json
+config.json
+mail-perms.json
--- a/README.md
+++ b/README.md
@@ -49,6 +49,28 @@ ccc-keygen --filter agent --output agent-secrets.json

 The full `secrets.json` stays on the host. `agent-secrets.json` goes into the container.

+### Create a config file
+
+Copy [`config.example.json`](config.example.json) to `config.json` and edit it:
+
+```json
+{
+    "secrets": "../secrets.json",
+    "mail_perms": "mail-perms.json",
+    "smtp": {
+        "host": "smtp.example.com",
+        "port": 587,
+        "secure": false,
+        "auth": { "user": "relay@example.com", "pass": "<password>" },
+        "from": "agent@example.com"
+    },
+    "bind": "127.0.0.1",
+    "port": 3015
+}
+```
+
+`secrets` and `mail_perms` paths are resolved relative to the config file. `smtp`, `mail_perms`, `bind`, and `port` are all optional.
+
 ---

 ## Running
@@ -56,15 +78,22 @@ The full `secrets.json` stays on the host. `agent-secrets.json` goes into the co
 ### Server (host)

 ```bash
-ccc-server --secrets secrets.json
+ccc-server --config config.json
+ccc-server --config config.json --dry-run
 ```

-Server environment variables:
-| Variable | Default | Description |
-|----------|---------|-------------|
-| `CONDUIT_PORT` | `3015` | Port to listen on |
-| `CONDUIT_BIND` | `127.0.0.1` | Address to bind to |
-| `CONDUIT_ROOT` | `/workspace` | Workspace root for path resolution |
+Server flags:
+| Flag | Env variable | Description |
+|------|-------------|-------------|
+| `--config <path>` | `CONDUIT_CONFIG` | Path to config file (required) |
+| `--dry-run` | — | Log all action invocations but do not execute them |
+
+Server environment variables (override config file values):
+| Variable | Description |
+|----------|-------------|
+| `CONDUIT_PORT` | Port to listen on |
+| `CONDUIT_BIND` | Address to bind to |
+| `CONDUIT_ROOT` | Label printed at startup (informational only — path resolution uses `VOLUME_MAPPING` in `server/helpers.mjs`) |

 ### Client (container / agent)

@@ -134,7 +163,12 @@ Built-in actions:
 | `list-actions` | auto-accept | — |
 | `edit-file` | auto-accept | `filename` (path) |
 | `open-browser` | queue | `url` (http/https only) |
-| `open-terminal` | queue | `path` (optional) |
+| `open-terminal` | queue | `path` (optional, defaults to workspace) |
+| `send-email` | auto-accept | `to`, `subject`, `body`, `topic` |
+| `set-mail-permission` | auto-accept | `target_user`, `to`, `allow` (bool), `topic` (optional — omit to match any topic) |
+| `get-mail-permissions` | auto-accept | `target_user` (optional) |
+
+`send-email` checks that the caller has a mail permission entry matching `(caller, to, topic)` before sending. Permissions are managed via `set-mail-permission`, which requires the caller to have `canApprove` over the target user — so only humans can grant/revoke permissions for agents.

 ### Adding actions

@@ -145,8 +179,9 @@ Edit `server/actions.mjs`. Each entry needs:
    description: 'What this does',
    params: [{ name: 'foo', required: true, type: 'string' }],
    policy: 'auto-accept',   // or 'auto-deny' | 'queue'
-    handler: ({ foo }) => {
-        // do something
+    handler: ({ foo }, ctx) => {
+        // ctx = { caller, users, mail_perm_store, mailer_send }
+        // ctx is optional — omit the second argument if you don't need it
        return { result: foo };
    },
 },
--- a/config.example.json
+++ b/config.example.json
@@ -0,0 +1,13 @@
+{
+	"secrets": "../secrets.json",
+	"mail_perms": "mail-perms.json",
+	"smtp": {
+		"host": "smtp.example.com",
+		"port": 587,
+		"secure": false,
+		"auth": { "user": "relay@example.com", "pass": "<password>" },
+		"from": "agent@example.com"
+	},
+	"bind": "127.0.0.1",
+	"port": 3015
+}
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,826 +0,0 @@
-{
-  "name": "claude-code-conduit",
-  "version": "0.1.0",
-  "lockfileVersion": 3,
-  "requires": true,
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-      "license": "MIT",
-      "dependencies": {
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-        "negotiator": "^1.0.0"
-      },
-      "engines": {
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-    "node_modules/body-parser": {
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-      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-2.2.2.tgz",
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-    },
-    "node_modules/wrappy": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
-      "integrity": "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ==",
-      "license": "ISC"
-    }
-  }
-}
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
  "name": "claude-code-conduit",
-  "version": "1.0.0",
+  "version": "1.1.0",
  "description": "A supervised action bridge between Claude Code and the host system",
  "type": "module",
  "scripts": {
@@ -15,6 +15,7 @@
  },
  "dependencies": {
    "blessed": "^0.1.81",
-    "express": "^5.2.1"
+    "express": "^5.2.1",
+    "nodemailer": "^8.0.2"
  }
 }
--- a/server/actions.mjs
+++ b/server/actions.mjs
@@ -2,7 +2,8 @@
 // policy: "auto-accept" | "auto-deny" | "queue"


-import { resolve_path, exec } from "./helpers.mjs";
+import { resolve_path } from './helpers.mjs';
+import { check_can_approve } from './auth.mjs';

 export const actions = {
 	"list-actions": {
@@ -23,7 +24,7 @@ export const actions = {
 		description: "Open a file in the editor",
 		params: [{ name: "filename", required: true, type: "path" }],
 		policy: "auto-accept",
-		handler: ({ filename }) => {
+		handler: ({ filename }, { exec }) => {
 			const resolved = resolve_path(filename);
 			exec('subl3', [resolved]);
 			return { opened: resolved };
@@ -47,7 +48,7 @@ export const actions = {
 		description: "Open a URL in the web browser",
 		params: [{ name: "url", required: true, type: "string" }],
 		policy: "queue",
-		handler: ({ url }) => {
+		handler: ({ url }, { exec }) => {
 			const parsed = new URL(url);
 			if (parsed.protocol !== 'http:' && parsed.protocol !== 'https:') {
 				throw new Error(`Disallowed protocol: ${parsed.protocol}`);
@@ -61,10 +62,62 @@ export const actions = {
 		description: "Open a terminal in a given directory",
 		params: [{ name: "path", required: false, type: "path" }],
 		policy: 'queue',
-		handler: ({ path }) => {
+		handler: ({ path }, { exec }) => {
 			const resolved = resolve_path(path ?? 'workspace');
 			exec('konsole', ['--workdir', resolved, '-e', 'bash']);
 			return { opened: resolved };
 		},
 	},
+
+	'send-email': {
+		description: 'Send an email to a permitted recipient',
+		params: [
+			{ name: 'to',      required: true,  type: 'string' },
+			{ name: 'subject', required: true,  type: 'string' },
+			{ name: 'body',    required: true,  type: 'string' },
+			{ name: 'topic',   required: true,  type: 'string' },
+		],
+		policy: 'auto-accept',
+		handler: async ({ to, subject, body, topic }, { caller, mail_perm_store, mailer_send }) => {
+			if (!mail_perm_store.check(caller, to, topic)) {
+				throw new Error(`Mail permission denied: ${caller} → ${to} [${topic}]`);
+			}
+			await mailer_send(to, subject, body);
+			return { sent: true, to, topic };
+		},
+	},
+
+	'set-mail-permission': {
+		description: 'Grant or revoke permission for a user to send email to a recipient/topic',
+		params: [
+			{ name: 'target_user', required: true,  type: 'string' },
+			{ name: 'to',          required: true,  type: 'string' },
+			{ name: 'topic',       required: false, type: 'string' },
+			{ name: 'allow',       required: true,  type: 'boolean' },
+		],
+		policy: 'auto-accept',
+		handler: ({ target_user, to, topic = null, allow }, { caller, users, mail_perm_store }) => {
+			if (!check_can_approve(users, caller, target_user)) {
+				throw new Error(`Not authorized to set mail permissions for '${target_user}'`);
+			}
+			if (allow) {
+				mail_perm_store.add(target_user, to, topic);
+			} else {
+				mail_perm_store.remove(target_user, to, topic);
+			}
+			return { target_user, to, topic, allow, permissions: mail_perm_store.list() };
+		},
+	},
+
+	'get-mail-permissions': {
+		description: 'List current mail permissions, optionally filtered by user',
+		params: [
+			{ name: 'target_user', required: false, type: 'string' },
+		],
+		policy: 'auto-accept',
+		handler: ({ target_user }, { mail_perm_store }) => {
+			const all = mail_perm_store.list();
+			return { permissions: target_user ? all.filter(e => e.user === target_user) : all };
+		},
+	},
 };
--- a/server/config.mjs
+++ b/server/config.mjs
@@ -0,0 +1,56 @@
+import { readFileSync } from 'fs';
+import { resolve } from 'path';
+
+export function load_config(file_path) {
+	if (!file_path) {
+		throw new Error('--config <path> is required');
+	}
+	let raw;
+	try {
+		raw = readFileSync(file_path, 'utf8');
+	} catch (err) {
+		throw new Error(`Cannot read config file at ${file_path}: ${err.message}`);
+	}
+	let parsed;
+	try {
+		parsed = JSON.parse(raw);
+	} catch (err) {
+		throw new Error(`Config file is not valid JSON: ${err.message}`);
+	}
+
+	if (!parsed.secrets) {
+		throw new Error("Config file must have a 'secrets' field pointing to the secrets file");
+	}
+
+	// Resolve secrets path relative to the config file's directory
+	const config_dir = resolve(file_path, '..');
+	const secrets_path = resolve(config_dir, parsed.secrets);
+
+	let secrets_raw;
+	try {
+		secrets_raw = readFileSync(secrets_path, 'utf8');
+	} catch (err) {
+		throw new Error(`Cannot read secrets file at ${secrets_path}: ${err.message}`);
+	}
+	let secrets;
+	try {
+		secrets = JSON.parse(secrets_raw);
+	} catch (err) {
+		throw new Error(`Secrets file is not valid JSON: ${err.message}`);
+	}
+	if (!secrets.users || typeof secrets.users !== 'object') {
+		throw new Error("Secrets file must have a top-level 'users' object");
+	}
+
+	const mail_perms_path = parsed.mail_perms
+		? resolve(config_dir, parsed.mail_perms)
+		: null;
+
+	return {
+		users:          secrets.users,
+		smtp:           parsed.smtp ?? null,
+		mail_perms_path,
+		bind:           parsed.bind ?? null,
+		port:           parsed.port ?? null,
+	};
+}
--- a/server/index.mjs
+++ b/server/index.mjs
@@ -1,8 +1,11 @@
 import express from 'express';
 import { actions } from './actions.mjs';
 import { enqueue, get_entry, list_pending, resolve } from './queue.mjs';
-import { load_secrets } from './secrets.mjs';
+import { load_config } from './config.mjs';
 import { create_auth_middleware, check_can_approve } from './auth.mjs';
+import { create_mailer } from './mailer.mjs';
+import { exec as real_exec } from './helpers.mjs';
+import { load_mail_perms } from './mail_perms.mjs';

 function get_arg(argv, flag) {
 	const i = argv.indexOf(flag);
@@ -13,18 +16,36 @@ function ts() {
 	return new Date().toLocaleTimeString();
 }

-const PORT = process.env.CONDUIT_PORT || 3015;
-const BIND = get_arg(process.argv, '--bind') || process.env.CONDUIT_BIND || '127.0.0.1';
+const VERBOSE  = process.argv.includes('--verbose');
+const DRY_RUN  = process.argv.includes('--dry-run');

-const secrets_path = get_arg(process.argv, '--secrets');
-let secrets;
+const config_path = get_arg(process.argv, '--config') || process.env.CONDUIT_CONFIG;
+
+let cfg;
 try {
-	secrets = load_secrets(secrets_path);
+	cfg = load_config(config_path);
 } catch (err) {
 	console.error(`Fatal: ${err.message}`);
 	process.exit(1);
 }
-const { users } = secrets;
+
+const { users, smtp, mail_perms_path } = cfg;
+const PORT  = process.env.CONDUIT_PORT || cfg.port  || 3015;
+const BIND  = process.env.CONDUIT_BIND || cfg.bind  || '127.0.0.1';
+
+let mail_perm_store;
+try {
+	mail_perm_store = load_mail_perms(mail_perms_path);
+} catch (err) {
+	console.error(`Fatal: ${err.message}`);
+	process.exit(1);
+}
+
+if (!mail_perms_path) {
+	console.warn('Warning: mail_perms not set in config; mail permissions will not persist across restarts');
+}
+
+const real_mailer_send = create_mailer(smtp);

 const app = express();
 app.use(express.json({
@@ -35,10 +56,27 @@ app.use(express.json({
 app.use(create_auth_middleware(users));

 app.use((req, _res, next) => {
+	const is_debug = req.method === 'GET' && req.path === '/queue';
+	if (!is_debug || VERBOSE) {
 		console.log(`[${ts()}] ${req.method} ${req.path} — ${req.conduit_user}`);
+	}
 	next();
 });

+function make_ctx(caller) {
+	const exec = DRY_RUN
+		? (bin, args) => console.log(`[${ts()}] [DRY-RUN] exec: ${bin} ${JSON.stringify(args)}`)
+		: real_exec;
+	const mailer_send = DRY_RUN
+		? async (to, subject) => console.log(`[${ts()}] [DRY-RUN] send-mail: to=${to} subject=${JSON.stringify(subject)}`)
+		: real_mailer_send;
+	return { caller, users, mail_perm_store, exec, mailer_send };
+}
+
+async function run_action(def, params, ctx) {
+	return def.handler(params, ctx);
+}
+
 function validate_params(action_def, params) {
 	const errors = [];
 	for (const p of action_def.params) {
@@ -71,9 +109,11 @@ app.post('/action', async (req, res) => {
 		return res.status(403).json({ status: 'denied', reason: 'Policy: auto-deny' });
 	}

+	const ctx = make_ctx(req.conduit_user);
+
 	if (def.policy === 'auto-accept') {
 		try {
-			const result = await def.handler(params);
+			const result = await run_action(def, params, ctx);
 			return res.json({ status: 'accepted', result });
 		} catch (err) {
 			return res.status(500).json({ status: 'error', error: err.message });
@@ -107,9 +147,10 @@ app.post('/queue/:id/approve', async (req, res) => {
 	entry.resolved_by = req.conduit_user;
 	resolve(req.params.id, 'approved');

+	const ctx = make_ctx(entry.submitted_by);
 	const def = actions[entry.action];
 	try {
-		const result = await def.handler(entry.params);
+		const result = await run_action(def, entry.params, ctx);
 		res.json({ status: 'approved', result });
 	} catch (err) {
 		res.status(500).json({ status: 'error', error: err.message });
@@ -137,4 +178,7 @@ app.post('/queue/:id/deny', (req, res) => {
 app.listen(PORT, BIND, () => {
 	console.log(`claude-code-conduit server running on ${BIND}:${PORT}`);
 	console.log(`Workspace root: ${process.env.CONDUIT_ROOT || '/workspace'}`);
+	if (DRY_RUN) {
+		console.log('DRY-RUN mode enabled — actions will be logged but not executed');
+	}
 });
--- a/server/mail_perms.mjs
+++ b/server/mail_perms.mjs
@@ -0,0 +1,49 @@
+import { readFileSync, writeFileSync, existsSync } from 'fs';
+
+export function load_mail_perms(file_path) {
+	let allowed = [];
+
+	if (file_path && existsSync(file_path)) {
+		try {
+			const parsed = JSON.parse(readFileSync(file_path, 'utf8'));
+			if (!Array.isArray(parsed.allowed)) {
+				throw new Error("'allowed' must be an array");
+			}
+			allowed = parsed.allowed;
+		} catch (err) {
+			throw new Error(`Cannot load mail permissions from ${file_path}: ${err.message}`);
+		}
+	}
+
+	function write() {
+		if (!file_path) {
+			return;
+		}
+		writeFileSync(file_path, JSON.stringify({ allowed }, null, '\t') + '\n', 'utf8');
+	}
+
+	function check(user, to, topic) {
+		return allowed.some(e => e.user === user && e.to === to && (e.topic === topic || e.topic === null));
+	}
+
+	function add(user, to, topic) {
+		if (!check(user, to, topic)) {
+			allowed.push({ user, to, topic });
+			write();
+		}
+	}
+
+	function remove(user, to, topic) {
+		const before = allowed.length;
+		allowed = allowed.filter(e => !(e.user === user && e.to === to && e.topic === topic));
+		if (allowed.length !== before) {
+			write();
+		}
+	}
+
+	function list() {
+		return [...allowed];
+	}
+
+	return { check, add, remove, list };
+}
--- a/server/mailer.mjs
+++ b/server/mailer.mjs
@@ -0,0 +1,18 @@
+import nodemailer from 'nodemailer';
+
+// Returns an async send(to, subject, body) function.
+// If smtp_config is absent, returns a stub that always throws.
+export function create_mailer(smtp_config) {
+	if (!smtp_config) {
+		return async () => {
+			throw new Error('SMTP not configured');
+		};
+	}
+
+	const { from, ...transport_config } = smtp_config;
+	const transporter = nodemailer.createTransport(transport_config);
+
+	return async function send(to, subject, body) {
+		await transporter.sendMail({ from, to, subject, text: body });
+	};
+}
--- a/server/secrets.mjs
+++ b/server/secrets.mjs
@@ -1,23 +0,0 @@
-import { readFileSync } from "fs";
-
-export function load_secrets(file_path) {
-	if (!file_path) {
-		throw new Error("--secrets <path> is required");
-	}
-	let raw;
-	try {
-		raw = readFileSync(file_path, "utf8");
-	} catch (err) {
-		throw new Error(`Cannot read secrets file at ${file_path}: ${err.message}`);
-	}
-	let parsed;
-	try {
-		parsed = JSON.parse(raw);
-	} catch (err) {
-		throw new Error(`Secrets file is not valid JSON: ${err.message}`);
-	}
-	if (!parsed.users || typeof parsed.users !== "object") {
-		throw new Error("Secrets file must have a top-level 'users' object");
-	}
-	return parsed;
-}
Author	SHA1	Message	Date
mikael-lovqvists-claude-agent	ba8c0701f8	Refactor server config: single --config flag replaces --secrets/--mail-perms - New server/config.mjs loads config.json, resolves secrets path relative to config dir, returns users/smtp/mail_perms_path/bind/port - server/secrets.mjs removed (logic absorbed into config.mjs) - smtp moves from secrets.json to config.json - secrets.json now contains only users (pure credentials) - config.example.json added as reference template - .gitignore/.npmignore updated to cover config.json and mail-perms.json - README updated with new setup and flags Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>	2026-03-17 23:16:30 +00:00
mikael-lovqvists-claude-agent	d06e11197a	Support wildcard topic in mail permissions topic: null in a permission entry now matches any topic, allowing broad grants without specifying a specific topic. set-mail-permission topic param is now optional; omitting it stores null (wildcard). Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>	2026-03-17 23:00:40 +00:00
mikael-lovqvists-claude-agent	64df986a5f	Thread exec and mailer_send through ctx instead of importing directly - actions.mjs no longer imports exec from helpers; uses ctx.exec instead - index.mjs builds ctx via make_ctx(), which injects dry-run stubs for exec and mailer_send when --dry-run is active - Handlers now run fully (including permission checks) in dry-run mode; only the actual side effects are stubbed out Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>	2026-03-17 22:58:00 +00:00
mikael-lovqvists-claude-agent	3841c5418a	Bump version to 1.1.0 Adds email support (send-email, set-mail-permission, get-mail-permissions), --dry-run flag, and --mail-perms persistence. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>	2026-03-17 22:46:56 +00:00
mikael-lovqvists-claude-agent	9668bae220	Add --dry-run flag to server When active, action invocations are logged (action name, caller, params) but no handler is executed. Applies to both auto-accept and approved queue entries. Startup message confirms the mode is active. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>	2026-03-17 22:41:09 +00:00
mikael-lovqvists-claude-agent	19e57f4e3e	Update README to match current implementation - Add send-email, set-mail-permission, get-mail-permissions to actions table - Document --mail-perms flag and CONDUIT_MAIL_PERMS env var - Correct CONDUIT_ROOT description (informational only, not path resolution) - Add ctx argument to "adding actions" example Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>	2026-03-17 22:39:14 +00:00
mikael-lovqvists-claude-agent	d2d9905a82	Remove package-lock.json from repo Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>	2026-03-17 22:37:14 +00:00
mikael-lovqvists-claude-agent	b1ccbfef41	Implement email support with per-user permission model (closes #2 ) New modules: - server/mailer.mjs: nodemailer transport wrapper - server/mail_perms.mjs: runtime permission store, persisted to disk New actions: - send-email: checks (caller, to, topic) permission before sending - set-mail-permission: grant/revoke permissions, gated by canApprove - get-mail-permissions: list current permissions Handler signature extended to handler(params, ctx) where ctx carries caller, users, mail_perm_store and mailer_send. Existing handlers ignore ctx so the change is backwards-compatible. SMTP config lives in secrets.json under optional 'smtp' key. Mail permissions path via --mail-perms or CONDUIT_MAIL_PERMS. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>	2026-03-17 22:34:26 +00:00
mikael-lovqvists-claude-agent	5fb9d3ce07	Suppress GET /queue logs unless --verbose Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>	2026-03-07 21:36:59 +00:00