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feat(agents): Tier 2 — AGENTS.md + per-session picker

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Six builtin defaults (Code Reviewer, Debugger, Refactorer, Architect,
Security Auditor, Prompt Builder) with no model field so session.model
wins. Project root AGENTS.md parsed on demand with mtime cache; when
present, only its agents are shown. sessions.agent_id resolves per turn
into effective system prompt, temperature, and a tool whitelist applied
in inference. AgentPicker mounts in the ChatInput toolbar; SettingsDrawer
agent surface deferred to Batch 7.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
indifferentketchup
2026-05-16 20:06:51 +00:00
parent 934f739ca1
commit 92bd3b1cdf
16 changed files with 984 additions and 35 deletions
Download Patch File Download Diff File Expand all files Collapse all files

40
apps/server/src/routes/sessions.ts
View File

@@ -5,17 +5,20 @@ import type { Config } from '../config.js';
import type { Broker } from '../services/broker.js';
import type { Session } from '../types/api.js';
import { getSetting } from './settings.js';
import { getAgentsForProject } from '../services/agents.js';
const CreateBody = z.object({
name: z.string().min(1).max(200).optional(),
model: z.string().min(1).max(200).optional(),
system_prompt: z.string().max(8000).optional(),
agent_id: z.string().min(1).max(200).nullable().optional(),
});
const PatchBody = z.object({
name: z.string().min(1).max(200).optional(),
model: z.string().min(1).max(200).optional(),
system_prompt: z.string().max(8000).optional(),
agent_id: z.string().min(1).max(200).nullable().optional(),
});
async function resolveDefaultModel(sql: Sql, config: Config): Promise<string> {
@@ -24,6 +27,13 @@ async function resolveDefaultModel(sql: Sql, config: Config): Promise<string> {
return config.DEFAULT_MODEL;
}
// First agent in the project's effective list (file-defined or builtin),
// or null if somehow none exist.
async function resolveDefaultAgent(projectPath: string): Promise<string | null> {
const { agents } = await getAgentsForProject(projectPath);
return agents[0]?.id ?? null;
}
export function registerSessionRoutes(
app: FastifyInstance,
sql: Sql,
@@ -40,7 +50,7 @@ export function registerSessionRoutes(
}
const status = req.query.status === 'archived' ? 'archived' : 'open';
const rows = await sql<Session[]>`
SELECT id, project_id, name, model, system_prompt, status, created_at, updated_at
SELECT id, project_id, name, model, system_prompt, status, created_at, updated_at, agent_id
FROM sessions
WHERE project_id = ${req.params.id} AND status = ${status}
ORDER BY updated_at DESC
@@ -57,11 +67,14 @@ export function registerSessionRoutes(
reply.code(400);
return { error: 'invalid body', details: parsed.error.flatten() };
}
const project = await sql`SELECT id FROM projects WHERE id = ${req.params.id}`;
const project = await sql<{ id: string; path: string }[]>`
SELECT id, path FROM projects WHERE id = ${req.params.id}
`;
if (project.length === 0) {
reply.code(404);
return { error: 'project not found' };
}
const projectPath = project[0]!.path;
let model = parsed.data.model;
if (!model) {
@@ -76,12 +89,18 @@ export function registerSessionRoutes(
const name = parsed.data.name ?? 'New session';
const systemPrompt = parsed.data.system_prompt ?? '';
// If the client provided agent_id (string or null), use it; otherwise
// resolve to the project's first agent (file-defined or builtin), or null.
const agentId =
parsed.data.agent_id !== undefined
? parsed.data.agent_id
: await resolveDefaultAgent(projectPath);
const row = await sql.begin(async (tx) => {
const [session] = await tx<Session[]>`
INSERT INTO sessions (project_id, name, model, system_prompt)
VALUES (${req.params.id}, ${name}, ${model}, ${systemPrompt})
RETURNING id, project_id, name, model, system_prompt, status, created_at, updated_at
INSERT INTO sessions (project_id, name, model, system_prompt, agent_id)
VALUES (${req.params.id}, ${name}, ${model}, ${systemPrompt}, ${agentId})
RETURNING id, project_id, name, model, system_prompt, status, created_at, updated_at, agent_id
`;
await tx`
INSERT INTO chats (session_id, name, status)
@@ -101,7 +120,7 @@ export function registerSessionRoutes(
app.get<{ Params: { id: string } }>('/api/sessions/:id', async (req, reply) => {
const rows = await sql<Session[]>`
SELECT id, project_id, name, model, system_prompt, status, created_at, updated_at
SELECT id, project_id, name, model, system_prompt, status, created_at, updated_at, agent_id
FROM sessions WHERE id = ${req.params.id}
`;
if (rows.length === 0) {
@@ -120,6 +139,10 @@ export function registerSessionRoutes(
return { error: 'invalid body', details: parsed.error.flatten() };
}
const { name, model, system_prompt } = parsed.data;
// agent_id is tri-state on the wire: omitted = no change, null = clear,
// string = set. CASE WHEN inside SET handles all three atomically.
const agentIdProvided = parsed.data.agent_id !== undefined;
const newAgentId = parsed.data.agent_id ?? null;
// Read the prior name so the post-update publish can skip no-op renames
// (PATCH { name: "Foo" } where the session is already "Foo"). The window
// between SELECT and UPDATE is sub-millisecond in the same request handler;
@@ -135,9 +158,10 @@ export function registerSessionRoutes(
name = COALESCE(${name ?? null}, name),
model = COALESCE(${model ?? null}, model),
system_prompt = COALESCE(${system_prompt ?? null}, system_prompt),
agent_id = CASE WHEN ${agentIdProvided} THEN ${newAgentId} ELSE agent_id END,
updated_at = clock_timestamp()
WHERE id = ${req.params.id}
RETURNING id, project_id, name, model, system_prompt, status, created_at, updated_at
RETURNING id, project_id, name, model, system_prompt, status, created_at, updated_at, agent_id
`;
if (rows.length === 0) {
reply.code(404);
@@ -183,7 +207,7 @@ export function registerSessionRoutes(
const rows = await sql<Session[]>`
UPDATE sessions SET status = 'open', updated_at = clock_timestamp()
WHERE id = ${req.params.id} AND status = 'archived'
RETURNING id, project_id, name, model, system_prompt, status, created_at, updated_at
RETURNING id, project_id, name, model, system_prompt, status, created_at, updated_at, agent_id
`;
if (rows.length === 0) {
reply.code(404);