diff --git a/README.md b/README.md
index 85e9166..787e0c6 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@ Ad-hoc reports only. The scheduled reports stay in
 
 ## How it works
 
-Two documents drive everything (plan §1, §2, §3):
+Two documents drive everything:
 
 | | Who writes it | When | Where |
 |---|---|---|---|
@@ -32,7 +32,7 @@ with `mu-call-scope-id` set so jobs-controller ignores it.
 ## One identity: mu-authorization's
 
 All SPARQL goes through the template's own helpers (`mu`'s `query` and
-`update`), like ipdc-bookmarks-service. They attach the caller's session from
+`update`). They attach the caller's session from
 the request context, and mu-authorization decides graphs and visibility; the
 service never touches an auth header. The context lives for the whole run,
 also past the `202` the chat turn answers with, so background writes stay
@@ -54,7 +54,7 @@ Dutch comes back with a trace of the tool calls. The CSV lands in
 `data/files/`. `history` carries the earlier turns for follow-ups; the
 conversation lives on the caller's side, the service stores nothing.
 
-`/assistant` is the chat (plan-fable-5-1, steps 1 and 3). The turn module in
+`/assistant` is the chat. The turn module in
 `src/chat/` is generic — it imports nothing from `src/llm/` or `src/runner/`
 and moves between services without edits — and `src/report-assistant.js` is
 this service's one `answer` hook. It records the question, answers `202` with
@@ -134,7 +134,7 @@ alone. A toezicht user can run the seed and read the CSV data, but the
 may not write that type), so the report URI the tools return is dangling for
 non-admin callers. Opening this up means adding the type to their group first.
 
-## Rules the code holds to (plan §9)
+## Rules the code holds to
 
 - Query `http://database:8890/sparql`. Never virtuoso. Never sudo.
 - No `GRAPH` clauses, no property paths, no aggregates, no inline comments:
@@ -142,15 +142,13 @@ non-admin callers. Opening this up means adding the type to their group first.
 - Generated queries use full URIs, no prefixes (a bare `mu:uuid` prefixed
   name without its PREFIX line is an opaque 500).
 
-## Libraries (plan §0)
+## Libraries
 
 - `n3` — Turtle parsing (profiles, specs)
-- hand-written: CSV writer (quotes only when needed, like today's reports),
-  the query builders, the agent loop (bare `fetch`, no provider SDK, no MCP
-  SDK — the tools are internal handlers, not an HTTP protocol)
+- hand-written: CSV writer (quotes only when needed), the query builders,
+  the agent loop (bare `fetch`, no provider SDK)
 
 ## What it will not do
 
 No counting, no sorting, no top-N, no comparing two subjects, one class per
-report, suggestions stop at the public graph. §10 of the plan has the full
-list and why.
\ No newline at end of file
+report, suggestions stop at the public graph.
\ No newline at end of file
diff --git a/app.js b/app.js
index 10521c1..520f448 100644
--- a/app.js
+++ b/app.js
@@ -8,10 +8,8 @@ import { reportAssistant } from './src/report-assistant.js';
 
 const PROFILE_DIR = process.env.PROFILE_DIR || '/config/profiles';
 
-// Profiles load fire-and-forget, like waitForDatabase in the bbcdr services:
-// routes are registered synchronously, handlers await the same promise, and a
-// call that lands before the load finishes just waits it out (local file
-// reads). If loading failed, calls answer an error instead of crashing boot.
+// Profiles load at boot; handlers await the same promise. A failed load
+// answers an error per request instead of crashing boot.
 let profilesPromise = loadProfiles(PROFILE_DIR);
 profilesPromise.catch(e => console.error('[profiles] loading failed:', e.message));
 
@@ -23,20 +21,15 @@ async function whenProfiles() {
   }
 }
 
-// The chat. The turn module is generic (src/chat/ moves between services
-// without edits); reportAssistant is this service's one answer hook: it runs
-// the loop below with the conversation so far and turns a report run into an
-// interim message with a pending file. Step 1's echo hook, kept for tests:
-//   answer: async (turn) => { await sleep(5000); return `Je schreef: ${turn.content}`; }
+// The chat. reportAssistant is the answer hook: it runs the LLM loop with the
+// conversation so far and turns a report run into an interim message with a
+// pending file.
 mountChat(app, { path: '/assistant', answer: reportAssistant(whenProfiles) });
 
-// The endpoint. One conversation turn in Dutch, the agent loop runs inside
-// (read the profiles, look up values on the public graph, write a spec,
-// validate and repair it, run the report) and the answer in Dutch comes back
-// with a trace of the tool calls. Follow-ups carry the earlier turns in
-// `history`; the conversation lives on the caller's side.
-// The template parses application/vnd.api+json only; the question comes as
-// plain JSON, so the route parses it itself, like the chat route does.
+// POST /ask: one question in, the answer in Dutch and a trace of the tool
+// calls back. Follow-ups carry the earlier turns in `history`.
+// The template parses application/vnd.api+json only; this route parses the
+// plain JSON body itself.
 app.post('/ask', express.json(), async (req, res) => {
   const { question, history } = req.body || {};
   if (!question) return res.status(400).json({ error: 'no question in the request body' });
diff --git a/dev-stubs/mu-hooks.mjs b/dev-stubs/mu-hooks.mjs
deleted file mode 100644
index f7e0522..0000000
--- a/dev-stubs/mu-hooks.mjs
+++ /dev/null
@@ -1,8 +0,0 @@
-// Maps the 'mu' import to dev-stubs/mu-stub.mjs, so tests run without the
-// template container.
-export async function resolve(specifier, context, nextResolve) {
-  if (specifier === 'mu') {
-    return { shortCircuit: true, url: new URL('./mu-stub.mjs', import.meta.url).href };
-  }
-  return nextResolve(specifier, context);
-}
diff --git a/dev-stubs/mu-stub.mjs b/dev-stubs/mu-stub.mjs
deleted file mode 100644
index 7526860..0000000
--- a/dev-stubs/mu-stub.mjs
+++ /dev/null
@@ -1,51 +0,0 @@
-// The template's helpers, shaped for the tests: query/update record every
-// SPARQL string, and a test steers the answers with setQueryHandler.
-// Registered for the 'mu' module by dev-stubs/register.js during tests only.
-import express from 'express';
-
-// The template's own app, stripped to what the tests mount routes on.
-export const app = express();
-
-export const state = { queries: [], updates: [], queryHandler: null };
-
-// Steer the stub's answers: setQueryHandler(sparql => bindings[])
-export function setQueryHandler(fn) { state.queryHandler = fn; }
-// Clear the recordings only; the handler stays.
-export function resetMu() {
-  state.queries.length = 0;
-  state.updates.length = 0;
-}
-
-export async function query(sparql) {
-  state.queries.push(sparql);
-  return { results: { bindings: state.queryHandler ? state.queryHandler(sparql) : [] }, head: { vars: [] } };
-}
-
-export async function update(sparql) {
-  state.updates.push(sparql);
-  return {};
-}
-
-export function sparqlEscapeString(value) {
-  return '"""' + value.replace(/[\\"]/g, (m) => '\\' + m) + '"""';
-}
-
-export function sparqlEscapeUri(value) {
-  return '<' + value.replace(/[\\"<>]/g, function (match) { return '\\' + match; }) + '>';
-}
-
-export function sparqlEscapeDateTime(value) {
-  return '"' + new Date(value).toISOString() + '"^^xsd:dateTime';
-}
-
-// The remaining template helpers db.js imports, copied from
-// helpers/mu/sparql.js in mu-javascript-template.
-export function sparqlEscapeInt(value) {
-  return '"' + Number.parseInt(value) + '"^^xsd:integer';
-}
-export function sparqlEscapeDate(value) {
-  return '"' + new Date(value).toISOString().substring(0, 10) + '"^^xsd:date';
-}
-export function sparqlEscapeBool(value) {
-  return value ? '"true"^^xsd:boolean' : '"false"^^xsd:boolean';
-}
diff --git a/dev-stubs/register.js b/dev-stubs/register.js
deleted file mode 100644
index 348b027..0000000
--- a/dev-stubs/register.js
+++ /dev/null
@@ -1,5 +0,0 @@
-// node --import ./dev-stubs/register.js <test file>
-// Registers the 'mu' resolve hook (mu-hooks.mjs -> mu-stub.mjs).
-import { register } from 'node:module';
-
-register(new URL('./mu-hooks.mjs', import.meta.url).href);
diff --git a/package-lock.json b/package-lock.json
index 8e14675..df92e3c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -11,29 +11,6 @@
       "dependencies": {
         "express": "^5.2.1",
         "n3": "^1.17.0"
-      },
-      "devDependencies": {
-        "sparqljs": "^3.7.4"
-      }
-    },
-    "node_modules/@rdfjs/types": {
-      "version": "1.1.2",
-      "resolved": "https://registry.npmjs.org/@rdfjs/types/-/types-1.1.2.tgz",
-      "integrity": "sha512-wqpOJK1QCbmsGNtyzYnojPU8gRDPid2JO0Q0kMtb4j65xhCK880cnKAfEOwC+dX85VJcCByQx5zOwyyfCjDJsg==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "@types/node": "*"
-      }
-    },
-    "node_modules/@types/node": {
-      "version": "26.5.1",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-26.5.1.tgz",
-      "integrity": "sha512-CzNm2FezW4VR/LjG6yUdiEgLE/rAQ9Slj5gCu/C2VrdcW7I0ahNZ8DRbHT7zOZ6r3ONgd/bsQIeSaoDGrd1C6g==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "undici-types": "~8.9.0"
       }
     },
     "node_modules/abort-controller": {
@@ -804,16 +781,6 @@
         "node": ">= 0.10"
       }
     },
-    "node_modules/rdf-data-factory": {
-      "version": "1.1.3",
-      "resolved": "https://registry.npmjs.org/rdf-data-factory/-/rdf-data-factory-1.1.3.tgz",
-      "integrity": "sha512-ny6CI7m2bq4lfQQmDYvcb2l1F9KtGwz9chipX4oWu2aAtVoXjb7k3d8J1EsgAsEbMXnBipB/iuRen5H2fwRWWQ==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "@rdfjs/types": "^1.0.0"
-      }
-    },
     "node_modules/readable-stream": {
       "version": "4.7.0",
       "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-4.7.0.tgz",
@@ -995,23 +962,6 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
-    "node_modules/sparqljs": {
-      "version": "3.7.4",
-      "resolved": "https://registry.npmjs.org/sparqljs/-/sparqljs-3.7.4.tgz",
-      "integrity": "sha512-hb4C84gf7KM7vz+iG595mPwvqxOvBJCm9L3dCxtV2zZDht6ZMmMG0tHeeqFeqwb9875yU9U4lhYe4LYRvWj0BQ==",
-      "deprecated": "Package no longer supported. Contact Support at https://www.npmjs.com/support for more info.",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "rdf-data-factory": "^1.1.2"
-      },
-      "bin": {
-        "sparqljs": "bin/sparql-to-json"
-      },
-      "engines": {
-        "node": "^12.22.0 || ^14.17.0 || >=16.0.0"
-      }
-    },
     "node_modules/statuses": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/statuses/-/statuses-2.0.2.tgz",
@@ -1070,13 +1020,6 @@
         "url": "https://opencollective.com/express"
       }
     },
-    "node_modules/undici-types": {
-      "version": "8.9.0",
-      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-8.9.0.tgz",
-      "integrity": "sha512-KTDyRTYX8sWmKXAikPHHSyc63CRPETMctyjKFupcC6OBLXT3xsN0e9aF7m+mIXutFWpUXuedtowG7iLOzp0kQg==",
-      "dev": true,
-      "license": "MIT"
-    },
     "node_modules/unpipe": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz",
diff --git a/package.json b/package.json
index 03abbf3..d72bdd4 100644
--- a/package.json
+++ b/package.json
@@ -6,14 +6,10 @@
   "type": "module",
   "main": "app.js",
   "scripts": {
-    "start": "node app.js",
-    "test": "node --import ./dev-stubs/register.js test/chat-store.mjs && node --import ./dev-stubs/register.js test/chat-turn.mjs && node --import ./dev-stubs/register.js test/ask-parse.mjs && node test/import-boundaries.mjs"
+    "start": "node app.js"
   },
   "dependencies": {
     "express": "^5.2.1",
     "n3": "^1.17.0"
-  },
-  "devDependencies": {
-    "sparqljs": "^3.7.4"
   }
 }
diff --git a/src/chat/index.js b/src/chat/index.js
index bec3606..a0ee4d3 100644
--- a/src/chat/index.js
+++ b/src/chat/index.js
@@ -1,9 +1,5 @@
-// The turn endpoint. Mount it on the service that answers:
-//
-//   mountChat(app, { path: '/assistant', answer });
-//
-// answer(turn) is the only thing the service writes. See the plan, §3, for
-// the turn object. This file knows nothing about what the answer is.
+// The turn endpoint. Mount it with mountChat(app, { path, answer });
+// answer(turn) is the only thing the mounting service writes.
 import express from 'express';
 import { query as muQuery, update as muUpdate } from 'mu';
 import {
@@ -23,8 +19,7 @@ export function mountChat(app, { path = '/assistant', answer }) {
     const content = String(req.body?.content ?? '').trim();
     if (!content) return res.status(400).json({ error: 'content is required' });
 
-    // 1. the access check: the query carries the caller's session, and the
-    // auth layer answers with what they may read
+    // 1. the access check: the caller's session decides what is readable
     let conversation;
     try {
       conversation = await readConversation(req.params.id);
@@ -49,10 +44,8 @@ export function mountChat(app, { path = '/assistant', answer }) {
       return res.status(500).json({ error: e.message });
     }
 
-    // 2. answer now; the assistant's message comes when it comes. The
-    // template's helpers keep attaching this request's session for the
-    // whole continuation, so the writes below stay the caller's;
-    // mu-authorization is in charge of what lands where.
+    // 2. answer 202 now; the assistant's message comes when it comes. The
+    // continuation still runs as the caller.
     res.status(202).json({ id: userMessage.id });
 
     const turn = {
diff --git a/src/chat/store.js b/src/chat/store.js
index ecc095f..b8f21db 100644
--- a/src/chat/store.js
+++ b/src/chat/store.js
@@ -1,6 +1,6 @@
-// The chat's reads and writes. Copy the folder as is; nothing here knows the
-// service it lives in. Full URIs everywhere: the auth layer rejects a prefixed
-// name with no PREFIX line with an opaque 500.
+// The chat's reads and writes. Nothing here knows the service it lives in.
+// Full URIs everywhere: the auth layer rejects a prefixed name with no
+// PREFIX line with an opaque 500.
 import { randomUUID } from 'crypto';
 import { query as muQuery, update as muUpdate,
          sparqlEscapeUri, sparqlEscapeString, sparqlEscapeDateTime } from 'mu';
@@ -31,8 +31,7 @@ const DOCUMENT_BASE = 'http://data.lblod.info/id/chat-documents/';
 
 const u = sparqlEscapeUri;
 const s = sparqlEscapeString;
-// The template helper writes ^^xsd:dateTime; the auth layer happens to bind
-// xsd, but the rule here is full URIs, so spell the type out.
+// Full URIs, so spell the dateTime type out.
 const dt = (value) => sparqlEscapeDateTime(value)
   .replace('xsd:dateTime', '<http://www.w3.org/2001/XMLSchema#dateTime>');
 
@@ -40,9 +39,7 @@ const bindings = (json) => json.results.bindings;
 
 // --- reads --------------------------------------------------------------------
 
-// The conversation by uuid, as the caller sees it (the query carries the
-// caller's session; the auth layer answers with what they may read).
-// null when not readable.
+// The conversation by uuid, null when the caller may not read it.
 export async function readConversation(id) {
   const json = await muQuery(`
     SELECT ?conversation ?title ?creator WHERE {
@@ -96,7 +93,7 @@ export async function writeMessage({ conversationUri, content, maker, attachment
     return { ...a, id, uri: `${DOCUMENT_BASE}${id}` };
   });
 
-  // Predicate pairs are joined with a semicolon, so no list ever ends on one.
+  // Predicate pairs joined with ';', never a trailing one: it breaks the Turtle.
   const pairs = [
     `${u(T.type)} ${u(T.post)}`,
     `${u(T.type)} ${u(T.instantMessage)}`,
@@ -152,7 +149,7 @@ export async function setDocumentUrl(documentUri, url, conversationUri) {
     }`);
 }
 
-// The file failed. The card disappears; the caller says why in a message.
+// The file failed; the card disappears, the caller says why in a message.
 export async function dropDocument(documentUri) {
   await muUpdate(`
     DELETE {
diff --git a/src/db.js b/src/db.js
index d693e6c..42dc6d2 100644
--- a/src/db.js
+++ b/src/db.js
@@ -5,11 +5,6 @@ import { query as muQuery, update as muUpdate,
 export { sparqlEscapeUri, sparqlEscapeString, sparqlEscapeInt,
          sparqlEscapeDateTime, sparqlEscapeDate, sparqlEscapeBool };
 
-// All SPARQL goes through the template's own helpers, like
-// ipdc-bookmarks-service. They attach the caller's session
-// (mu-session-id, mu-call-id) from the request context, and
-// mu-authorization decides graphs and visibility. The service never
-// touches an auth header itself.
 export async function sessionQuery(sparql)  { return muQuery(sparql); }
 export async function sessionUpdate(sparql) { return muUpdate(sparql); }
 
@@ -18,10 +13,8 @@ export function stripStoreError(text) {
   return String(text).split('\n')[0].slice(0, 300);
 }
 
-// The per-request bundle the tools use: the template's query and update.
-// The request context lives for the whole run, also past the 202 the chat
-// turn answers with, so mu-authorization keeps rewriting with the caller's
-// session. We add nothing to it.
+// The request context lives for the whole run, also past the 202 a chat turn
+// answers with, so every write stays the caller's.
 export async function buildSession() {
   return { query: sessionQuery, update: sessionUpdate };
 }
diff --git a/src/llm/describe.js b/src/llm/describe.js
index c258b6b..5397be3 100644
--- a/src/llm/describe.js
+++ b/src/llm/describe.js
@@ -1,8 +1,6 @@
-// Turn a shapes graph into the flat list an LLM reads well (plan §7.3). Not
-// Turtle: a plain text menu of entities, their fields and the code lists.
-// Code lists under INLINE_VALUES_MAX are inlined at request time
-// (sessionQuery; mu-authorization decides what is visible) and refreshed
-// every VALUES_TTL, so the LLM never has to search the short ones.
+// A profile as a plain text menu: entities, fields, code lists. Code lists up
+// to INLINE_VALUES_MAX are inlined and cached for VALUES_TTL, so the LLM
+// never has to search the short ones.
 
 import { fieldsOf, entityForClass } from '../runner/profile.js';
 import { sessionQuery } from '../db.js';
diff --git a/src/llm/lookup.js b/src/llm/lookup.js
index 965ac95..837ed1f 100644
--- a/src/llm/lookup.js
+++ b/src/llm/lookup.js
@@ -1,8 +1,6 @@
-// lookup_values: search a code list too long to inline. One query through
-// the template helper, regex on str(?label) so language-tagged labels still
-// match. Returns the matches, the total, and an `exact` flag when a label
-// equals the term (case aside) so the LLM can settle disambiguation on its
-// own.
+// Search a code list too long to inline: regex on str(?label), so
+// language-tagged labels match. Returns the matches, the total, and an
+// `exact` flag when a label equals the term (case aside).
 
 import { sessionQuery, sparqlEscapeString } from '../db.js';
 import { fieldsOf, entityForClass } from '../runner/profile.js';
@@ -24,7 +22,7 @@ export async function lookupValues(profile, term, fieldSpec) {
   // The profile's sh:class is the type the data should carry, but code lists
   // sometimes type their entries differently (MAR codes are
   // ext:supervision/Nomenclature, the profile says skos:Concept). Prefer rows
-  // matching the asked class; fall back to all rows. The query reads more
+  // matching the asked class, fall back to all rows. The query reads more
   // rows than LIMIT so an exact hit deeper in the alphabet still surfaces.
   const wanted = bindings.filter(b => type && b.type?.value === type);
   const rows = wanted.length ? wanted : bindings;
@@ -92,9 +90,8 @@ function resolveClass(profile, fieldSpec) {
     const linked = profile.shapes.find(s => s.uri === f.node);
     return linked?.targetClass || null;
   }
-  // "bestuurseenheid.naam": the model chained link→value (shape.field on the
-  // linked shape). Resolve it: find the shape whose *name or label* matches,
-  // and whose rdf:type is in the data, then search that type.
+  // The model sometimes writes shape.field on a linked shape
+  // ("bestuurseenheid.naam"); resolve it to that shape's target class.
   for (const s of profile.shapes) {
     if (s.label === shapeLabel || shortType(s.targetClass) === shapeLabel) {
       return s.targetClass;
diff --git a/src/llm/loop.js b/src/llm/loop.js
index cbe691a..657c81b 100644
--- a/src/llm/loop.js
+++ b/src/llm/loop.js
@@ -1,16 +1,6 @@
-// The agent loop. One code path, one provider: POST /v1/chat/completions
-// with tool calls, OpenAI-compatible (OpenAI, Azure, Ollama, LiteLLM, vLLM,
-// Mistral). No provider SDKs. Three variables: LLM_BASE_URL, LLM_MODEL,
-// LLM_API_KEY.
-//
-// The loop is the only stateful party: it keeps the message history, calls the
-// MCP tools through the same handlers a real MCP client would, and stops when
-// the model writes no more tool calls. validate_spec is driven up to
-// MAX_REPAIR_ROUNDS, then run_report.
-//
-// This module is what the ten-question check runs against. It does not import
-// from 'mu' or sessionQuery; it receives the tool handlers and a session
-// bundle from the caller, so it works against any profile set and any session.
+// The agent loop: POST /v1/chat/completions with tool calls,
+// OpenAI-compatible (LLM_BASE_URL, LLM_MODEL, LLM_API_KEY). No provider
+// SDKs. Stops when the model answers without tool calls.
 
 import { buildTools } from './tools.js';
 
@@ -44,13 +34,9 @@ up to three rounds. Then call run_report.
 Earlier turns are context only. Answer the last one.`;
 
 // ask(questionOrMessages, profiles, session) → { text, trace }
-// A string is one question, as before. An array is the conversation so far,
-// [{ role: 'user' | 'assistant', content }], newest last. The system prompt
-// is always this file's own; a system message in the input is dropped, so a
-// caller cannot widen it. The loop appends every model reply and tool result
-// to the messages, so a caller can keep one conversation across many reports.
-// Returns the model's final text plus a trace of every tool call it made (for
-// the leak test and for debugging).
+// A string is one question; an array is the conversation so far,
+// [{ role, content }], newest last. The system prompt is always this file's
+// own; a system message in the input is dropped.
 export async function ask(questionOrMessages, profiles, session) {
   const { handlers } = buildTools(profiles, session);
   const trace = [];
@@ -90,8 +76,7 @@ export async function ask(questionOrMessages, profiles, session) {
 }
 
 async function chat(messages) {
-  // Providers echo extra fields (litellm adds provider_specific_fields, Mistral
-  // rejects them on the way back). Send only the portable wire shape.
+  // Send only the fields every provider accepts back.
   const wire = messages.map(m => {
     const out = { role: m.role, content: m.content ?? null };
     if (m.tool_calls) {
@@ -139,8 +124,7 @@ function parseArgs(s) {
 }
 
 // messagesFor(question) — a fresh conversation: system prompt plus the user
-// question. Turn this into your own history array to follow up in the same
-// conversation.
+// question.
 export function messagesFor(question) {
   return [
     { role: 'system', content: SYSTEM_PROMPT },
@@ -148,8 +132,7 @@ export function messagesFor(question) {
   ];
 }
 
-// The tool definitions sent to the model. Same names and args as the MCP
-// schemas, trimmed to what the model needs.
+// The tool definitions sent to the model.
 import { toolSchemas } from './schemas.js';
 function toolDefs() {
   return toolSchemas().map(t => ({
diff --git a/src/llm/schemas.js b/src/llm/schemas.js
index 530e475..b448868 100644
--- a/src/llm/schemas.js
+++ b/src/llm/schemas.js
@@ -1,6 +1,5 @@
-// The JSON schemas for the eight tools, in the shape the MCP ListTools call
-// returns. Keep these short and Dutch-aware: the descriptions are what the
-// LLM reads to decide which tool to call.
+// The JSON schemas of the eight tools. The descriptions are what the LLM
+// reads to decide which tool to call.
 
 export function toolSchemas() {
   return [
diff --git a/src/llm/tools.js b/src/llm/tools.js
index 3ab4d1b..4394153 100644
--- a/src/llm/tools.js
+++ b/src/llm/tools.js
@@ -1,10 +1,7 @@
-// The eight MCP tools the LLM calls. Each maps to a runner/ function or a
-// profile/db read. What they return is always a job URI, a status, a count,
-// a link, column names or an error we wrote, never a cell value (the §8
-// guarantee).
-//
-// The shape every tool returns is { content: [{ type: 'text', text }] } so the
-// loop can pass it straight back to the model.
+// The eight tools the LLM calls. They return a job URI, a status, a count, a
+// link, column names or an error we wrote — never a cell value. The shape
+// every tool returns is { content: [{ type: 'text', text }] }, which the loop
+// passes straight back to the model.
 
 import { checkSpec } from '../runner/check.js';
 import { parseSpec } from '../runner/spec.js';
@@ -16,12 +13,8 @@ import { lookupValues } from './lookup.js';
 const MAX_PATH_DEPTH = Number(process.env.MAX_PATH_DEPTH || 8);
 const RUN_TIMEOUT = Number(process.env.RUN_TIMEOUT || 60) * 1000;
 
-// buildTools(profiles, session) → { tools: Tool[], handlers: Map<name, fn> }
-// `session` is the request's { query, update } bundle: the template's own
-// helpers, which attach the caller's session from the request context.
-// run_report starts the run and waits up to RUN_TIMEOUT so the LLM gets the
-// result in one turn when it is quick.
-
+// buildTools(profiles, session) → { handlers }
+// run_report waits up to RUN_TIMEOUT so a quick run returns in one turn.
 export function buildTools(profiles, session) {
   const profileList = () => [...profiles.values()].map(p => ({ id: p.uri, title: p.title }));
 
@@ -75,13 +68,13 @@ export function buildTools(profiles, session) {
     const errors = checkSpec(parsed, p, MAX_PATH_DEPTH, profiles);
     if (errors.length) return text(`the spec is not valid: ${errors[0]}`);
     try {
-      // The spec's own dct:title names the report; there is no other input.
+      // The spec's dct:title names the report.
       const name = parsed.title || 'report';
       await session.onReportStart?.({ title: name, fileName: `${slug(name)}.csv` });
       const running = run(session.query, session.update, parsed, p, name);
-      // The end callback fires even when withTimeout below has given up: the
-      // run is not cancelled, and the file arrives when it arrives. The
-      // rejection handler also keeps a late failure from crashing Node 20.
+      // The end callback also fires after the timeout gave up: the run is not
+      // cancelled, the file arrives when it arrives. The .catch keeps a late
+      // failure from crashing the process.
       running
         .then((r) => session.onReportEnd?.(null, r), (e) => session.onReportEnd?.(e))
         .catch((e) => console.error('[reports] end callback failed:', e));
diff --git a/src/report-assistant.js b/src/report-assistant.js
index 208b397..83e6b3d 100644
--- a/src/report-assistant.js
+++ b/src/report-assistant.js
@@ -1,6 +1,6 @@
-// The report assistant: what the chat says when this service answers a turn.
-// Runs the iteration-1 loop with the conversation so far, and turns a report
-// run into an interim message with a pending file.
+// What this service answers a chat turn with: the LLM loop with the
+// conversation so far, and a report run becomes an interim message with a
+// pending file.
 import { ask } from './llm/loop.js';
 
 const TEXT = {
@@ -8,13 +8,11 @@ const TEXT = {
   failed: 'Het rapport is mislukt. Stel de vraag opnieuw, of anders geformuleerd.',
 };
 
-// whenProfiles() resolves once the SHACL profiles are loaded (app.js keeps
-// the load promise), so the chat mounts before the profiles are in.
+// The chat mounts before the profiles are in; whenProfiles waits for the load.
 export function reportAssistant(whenProfiles) {
   return async function answer(turn) {
-    // the pending file of the current run; the end callback needs the one
-    // the start callback made. One report per turn: a second run_report in
-    // the same turn overwrites this before the first end callback fires.
+    // One pending file per turn: a second run_report overwrites it before the
+    // first end callback fires.
     let pendingDocument = null;
 
     const session = {
@@ -43,8 +41,8 @@ export function reportAssistant(whenProfiles) {
   };
 }
 
-// The file service serves /files/<uuid>/download, and the logical file URI
-// that registerFile returns ends in that uuid.
+// The file service serves /files/<uuid>/download; the logical file URI ends
+// in that uuid.
 function downloadHref(fileUri) {
   return `/files/${fileUri.split('/').pop()}/download`;
 }
diff --git a/src/runner/check.js b/src/runner/check.js
index b39ef6d..0366cd0 100644
--- a/src/runner/check.js
+++ b/src/runner/check.js
@@ -7,17 +7,16 @@ const XSD = 'http://www.w3.org/2001/XMLSchema#';
 const XSD_DATE = XSD + 'date';
 const XSD_DATETIME = XSD + 'dateTime';
 
-// The validator. checkSpec(spec, profile, maxPathDepth) runs the named checks
-// in order and returns the FIRST error as a one-element array (empty if ok).
-// Every message names the thing that is wrong in the profile's own words and
-// says what to write instead. No database call anywhere in this file — that is
-// what lets an LLM iterate for free.
+// The validator. checkSpec runs the checks in order and returns the first
+// error as a one-element array (empty if ok). Every message names the thing
+// that is wrong in the profile's own words and says what to write instead.
+// No database call anywhere in this file.
 
 const ANYOF_MAX_TERMS = 24;
 const ANYOF_MAX_TERM_LENGTH = 100;
 
-// 1 + 2. the profile names itself and is one we have. knownProfiles is the
-// Map app.js loaded at boot; omit it and the check is skipped (fixtures).
+// The spec names a profile we have. knownProfiles is the profile Map loaded
+// at boot; the check is skipped when it is omitted.
 function profileNamed(spec, knownProfiles) {
   if (!spec.profileUri) {
     return `no rep:profile named. Available: ${knownProfiles ? [...knownProfiles.values()].map(p => p.title).join(', ') : '(none)'} .`;
@@ -28,7 +27,7 @@ function profileNamed(spec, knownProfiles) {
   return null;
 }
 
-// 3 + 4. the target class is in the profile
+// The target class is in the profile
 function targetClass(spec, profile) {
   if (!spec.targetClass) {
     return `no sh:targetClass. In "${profile.title}" you can list: ${shapeList(profile)}.`;
@@ -43,13 +42,13 @@ function shapeList(profile) {
   return profile.shapes.map(s => s.label || s.targetClass).join(', ');
 }
 
-// 5. columns exist
+// Columns exist
 function columnsPresent(spec) {
   if (!spec.columns.length) return 'no columns. Add at least one rep:columns entry.';
   return null;
 }
 
-// 6. every column has a label
+// Every column has a label
 function columnLabel(spec) {
   for (const col of spec.columns) {
     if (!col.label) return 'a column has no rdfs:label.';
@@ -57,7 +56,7 @@ function columnLabel(spec) {
   return null;
 }
 
-// 7. labels unique
+// Labels are unique
 function columnLabelsUnique(spec) {
   const seen = new Map();
   for (const col of spec.columns) {
@@ -69,7 +68,7 @@ function columnLabelsUnique(spec) {
   return null;
 }
 
-// 8 + 9 + 10. every path resolves, columns end on a value, depth capped
+// Every path resolves, columns end on a value, depth capped
 function pathsResolve(spec, profile, maxPathDepth) {
   const startShapeUri = entityForClass(profile, spec.targetClass);
   for (const col of spec.columns) {
@@ -85,7 +84,7 @@ function pathsResolve(spec, profile, maxPathDepth) {
   return null;
 }
 
-// 11. sh:min/sh:max only on numbers and dates
+// sh:min/sh:max only on numbers and dates
 function collectMinMaxTyped(spec, profile) {
   const startShapeUri = entityForClass(profile, spec.targetClass);
   for (const col of spec.columns) {
@@ -108,7 +107,7 @@ function collectMinMaxTyped(spec, profile) {
   return null;
 }
 
-// 13. at most one rep:row column
+// At most one rep:row column
 function oneRowColumn(spec) {
   const rowCols = spec.columns.filter(c => c.collect === REP + 'row');
   if (rowCols.length > 1) {
@@ -118,7 +117,7 @@ function oneRowColumn(spec) {
   return null;
 }
 
-// 12 + 14. columns carry no constraints; known collect mode
+// Columns carry no constraints; known collect mode
 function columnPure(spec) {
   for (const col of spec.columns) {
     if (Object.keys(col.constraints || {}).length) {
@@ -132,7 +131,7 @@ function columnPure(spec) {
   return null;
 }
 
-// 15. no label inside a filter
+// No label inside a filter
 function filterLabel(spec) {
   for (const filter of spec.filters) {
     if ((filter.constraints || {}).label) {
@@ -142,7 +141,7 @@ function filterLabel(spec) {
   return null;
 }
 
-// 15b. a filter with a path but no constraint selects everything; the model
+// A filter with a path but no constraint selects everything; the model
 // almost certainly meant to filter. Refuse and say what to add.
 function filterConstraint(spec) {
   const MEANINGFUL = ['minCount', 'maxCount', 'hasValue', 'in', 'minInclusive',
@@ -157,7 +156,7 @@ function filterConstraint(spec) {
   return null;
 }
 
-// 16. sh:maxCount above 0 needs counting
+// sh:maxCount above 0 needs counting
 function maxCountZero(spec) {
   for (const [i, filter] of spec.filters.entries()) {
     const c = filter.constraints;
@@ -171,7 +170,7 @@ function maxCountZero(spec) {
   return null;
 }
 
-// 17 + 18. rep:anyOf size limits
+// rep:anyOf size limits
 function anyOfLimits(spec) {
   for (const [i, filter] of spec.filters.entries()) {
     const c = filter.constraints;
@@ -191,7 +190,7 @@ function anyOfLimits(spec) {
   return null;
 }
 
-// 19. sh:in mixes URIs and literals
+// sh:in must not mix URIs and literals
 function inHomogeneous(spec) {
   for (const filter of spec.filters) {
     const c = filter.constraints;
@@ -204,7 +203,7 @@ function inHomogeneous(spec) {
   return null;
 }
 
-// 20. typed literals that will not parse
+// Typed literals must parse
 function literalsParse(spec) {
   const constraintTerms = [];
   for (const filter of spec.filters) {
@@ -259,8 +258,8 @@ export function checkSpec(spec, profile, maxPathDepth, knownProfiles = null) {
   return [];
 }
 
-// The shape a column's path lands in: follow sh:node through every hop but
-// the last. walk() has already validated the path, so any gap means the walk
+// The shape a path lands in: follow sh:node through every hop but the
+// last. walk() has already validated the path, so a gap here means the walk
 // reported the real error and this can bail.
 function shapeAfter(profile, startShapeUri, hops) {
   let shapeUri = startShapeUri;
diff --git a/src/runner/csv.js b/src/runner/csv.js
index 96dc2dc..1b396a5 100644
--- a/src/runner/csv.js
+++ b/src/runner/csv.js
@@ -1,9 +1,8 @@
 import { mkdirSync, writeFileSync } from 'fs';
 
-// Rows to a CSV file. CSV_SEPARATOR is ';' by default.
-// A cell is quoted only when it holds the separator, a quote or a newline —
-// this matches the shape of today's loket-report-generation-service output.
-// A quote inside a cell is doubled, per RFC 4180.
+// Rows to a CSV file. CSV_SEPARATOR is ';' by default. A cell is quoted
+// only when it holds the separator, a quote or a newline; a quote inside a
+// cell is doubled, per RFC 4180.
 
 const CSV_SEPARATOR = process.env.CSV_SEPARATOR || ';';
 const SHARE_DIR = process.env.SHARE_DIR || '/share';
diff --git a/src/runner/job.js b/src/runner/job.js
index fb6149f..7938400 100644
--- a/src/runner/job.js
+++ b/src/runner/job.js
@@ -1,13 +1,9 @@
 import { randomUUID } from 'crypto';
 import { sparqlEscapeUri, sparqlEscapeString, sparqlEscapeDateTime } from '../db.js';
 
-// cogs:Job + task:Task, written by us. No other service is involved.
-// Triples follow §6 of plan-opus-5.iteration-1-4.md; the shape follows
-// config/resources/master-job-domain.lisp.
-// Every write carries mu-call-scope-id (REPORT_SCOPE) so the delta notifier
-// lets jobs-controller ignore our statuses — it throws on unknown operations.
-// All functions take the update function to use: scopedUpdate(sparql, extra),
-// which sends the captured groups plus this scope header.
+// cogs:Job + task:Task, written by us; no other service is involved. Every
+// write carries mu-call-scope-id (REPORT_SCOPE) so the delta notifier lets
+// jobs-controller ignore our statuses — it throws on unknown operations.
 
 const REPORT_SCOPE = 'http://redpencil.data.gift/id/concept/muScope/report-generation';
 const JOB_BASE = process.env.JOB_URI_BASE || 'http://redpencil.data.gift/id/job/';
@@ -32,9 +28,7 @@ const TASK = 'http://redpencil.data.gift/vocabularies/tasks/';
 const OSLC_MESSAGE = 'http://open-services.net/ns/core#message';
 const OSLC_ERROR_URI = 'http://open-services.net/ns/core#Error';
 
-// updateFn(sparql, extraHeaders) — app.js passes scopedUpdate, which sends
-// the captured groups; the scope header is added here so every job write is
-// opt-out-able for the delta notifier.
+// Adds the scope header to every job write.
 function withScope(updateFn) {
   return async sparql => updateFn(sparql, { 'mu-call-scope-id': REPORT_SCOPE });
 }
diff --git a/src/runner/profile.js b/src/runner/profile.js
index 205a9f4..ffa19be 100644
--- a/src/runner/profile.js
+++ b/src/runner/profile.js
@@ -8,9 +8,7 @@ const RDF = 'http://www.w3.org/1999/02/22-rdf-syntax-ns#';
 const OWL_ONTOLOGY = 'http://www.w3.org/2002/07/owl#Ontology';
 
 export async function loadProfiles(dir) {
-  // eslint-disable-next-line no-undef
   const fs = await import('fs');
-  // eslint-disable-next-line no-undef
   const path = await import('path');
   const files = fs.readdirSync(dir).filter(f => f.endsWith('.ttl')).sort();
   const profiles = new Map();
diff --git a/src/runner/report.js b/src/runner/report.js
index 24f15d0..05834ff 100644
--- a/src/runner/report.js
+++ b/src/runner/report.js
@@ -5,9 +5,9 @@ import { sessionUpdate, sparqlEscapeUri, sparqlEscapeString, sparqlEscapeInt,
 
 const REPORT_CLASS = process.env.REPORT_CLASS || 'http://lblod.data.gift/vocabularies/reporting/Report';
 
-// Write the file to /share, then register it once: a logical file
-// (http://data.lblod.info/files/<uuid>) plus a physical share:// file
-// pointing back with nie:dataSource. The logical URI is what you link to.
+// Register the CSV: a logical file (http://data.lblod.info/files/<uuid>) plus
+// a physical share:// file pointing back with nie:dataSource. The logical
+// URI is what you link to.
 export async function registerFile(sessionUpdateFn, fileName, filePath) {
   const size = statSync(filePath).size;
   const uuid = randomUUID();
@@ -36,8 +36,7 @@ export async function registerFile(sessionUpdateFn, fileName, filePath) {
   return logicalUri;
 }
 
-// One report pointing at the logical file URI. Insert without naming a graph;
-// the auth layer places the triples from the caller's session.
+// One report pointing at the logical file URI.
 export async function registerReport(sessionUpdateFn, title, fileUri, extra = {}) {
   const uuid = randomUUID();
   const now = new Date();
diff --git a/src/runner/run.js b/src/runner/run.js
index 520a0dd..4c95328 100644
--- a/src/runner/run.js
+++ b/src/runner/run.js
@@ -5,11 +5,9 @@ import { rowsToCsv, writeCsv } from './csv.js';
 import { registerFile, registerReport } from './report.js';
 import { touch } from './job.js';
 
-// Ties the six steps together. `query` and `update` are the template's own
-// helpers: they attach the caller's session from the request context, which
-// lives for the whole run (also past the 202), so mu-authorization keeps
-// deciding graphs and visibility. Returns { reportUri, fileUri, rowCount }.
-// The task is touched once per column group so the dashboard shows movement.
+// Ties the steps together: seed → columns → assemble → CSV → register.
+// Returns { reportUri, fileUri, rowCount }. The task is touched once per
+// column group so the dashboard shows movement.
 
 export async function run(query, update, parsed, profile, title, taskUri, extra = {}) {
   const subjects = await seed(query, parsed);
@@ -29,8 +27,8 @@ export async function run(query, update, parsed, profile, title, taskUri, extra
   return { reportUri, fileUri, rowCount: rows.length - 1, filePath };
 }
 
-// Exported for run_report: the file name must be known before the run starts,
-// so the chat can show a pending card named after the report.
+// The file name must be known before the run starts, so the chat can show a
+// pending card named after the report.
 export function slug(title) {
   return (title || 'report').toLowerCase()
     .replace(/[^a-z0-9]+/g, '-')
diff --git a/src/runner/seed.js b/src/runner/seed.js
index d01c6ce..76accd8 100644
--- a/src/runner/seed.js
+++ b/src/runner/seed.js
@@ -1,8 +1,6 @@
 import { sparqlEscapeUri, sparqlEscapeString, sparqlEscapeDateTime, sparqlEscapeDate } from '../db.js';
 
 // Subject selection. One paged query per page; stops at ROW_LIMIT.
-// No GRAPH, no property paths, every hop its own variable.
-
 const ROW_LIMIT = Number(process.env.ROW_LIMIT || 200000);
 const PAGE_SIZE = Number(process.env.SEED_PAGE_SIZE || 5000);
 
diff --git a/test/ask-parse.mjs b/test/ask-parse.mjs
deleted file mode 100644
index 8a8b7ed..0000000
--- a/test/ask-parse.mjs
+++ /dev/null
@@ -1,45 +0,0 @@
-// POST /ask reads req.body, but the mu template only parses
-// application/vnd.api+json; the route mounts express.json() for plain
-// application/json, like the chat route does. Without an LLM configured a
-// well-formed question must answer 503, not the "no question" 400.
-//
-//   npm test          (or: node --import ./dev-stubs/register.js test/ask-parse.mjs)
-
-import assert from 'node:assert/strict';
-
-delete process.env.LLM_BASE_URL;
-
-let failures = 0;
-async function check(name, fn) {
-  try {
-    await fn();
-    console.log(`ok - ${name}`);
-  } catch (e) {
-    failures++;
-    console.error(`FAIL - ${name}\n    ${e.message}`);
-  }
-}
-
-const { app } = await import('mu');
-await import('../app.js');
-const server = app.listen(0);
-const base = `http://localhost:${server.address().port}`;
-
-const post = (path, body) => fetch(`${base}${path}`, {
-  method: 'POST',
-  headers: { 'Content-Type': 'application/json' },
-  body: JSON.stringify(body),
-});
-
-await check('a plain JSON question parses and answers 503 without an LLM', async () => {
-  const res = await post('/ask', { question: 'meldingen met MAR-code 7300' });
-  assert.equal(res.status, 503);
-});
-
-await check('an empty body is still the 400', async () => {
-  const res = await post('/ask', {});
-  assert.equal(res.status, 400);
-});
-
-server.close();
-process.exit(failures ? 1 : 0);
diff --git a/test/chat-store.mjs b/test/chat-store.mjs
deleted file mode 100644
index 8f20899..0000000
--- a/test/chat-store.mjs
+++ /dev/null
@@ -1,94 +0,0 @@
-// The chat store's SPARQL, asserted on the strings the mu stub records and
-// parsed with sparqljs, so a syntax slip fails in the test and not against
-// the auth layer.
-//
-//   npm test          (or: node --import ./dev-stubs/register.js test/chat-store.mjs)
-
-import assert from 'node:assert/strict';
-import { resetMu, state } from 'mu';
-import { writeMessage, setDocumentUrl, dropDocument } from '../src/chat/store.js';
-import { Parser } from 'sparqljs';
-
-const CONVERSATION = 'http://data.lblod.info/id/chat-conversations/9ab4';
-
-let failures = 0;
-async function check(name, fn) {
-  try {
-    await fn();
-    console.log(`ok - ${name}`);
-  } catch (e) {
-    failures++;
-    console.error(`FAIL - ${name}\n    ${e.message}`);
-  }
-}
-
-await check('writeMessage: both types, the container, the uuid', async () => {
-  resetMu();
-  const { id } = await writeMessage({ conversationUri: CONVERSATION, content: 'Hallo?' });
-  const q = state.updates[0];
-  assert.ok(q.includes('<http://rdfs.org/sioc/ns#Post>'), 'sioc:Post');
-  assert.ok(q.includes('<http://rdfs.org/sioc/types#InstantMessage>'), 'sioct:InstantMessage');
-  assert.ok(q.includes(`<${CONVERSATION}>`), 'the container');
-  assert.ok(q.includes(id), 'the uuid');
-  assert.ok(q.includes('Hallo?'), 'the content');
-});
-
-await check('writeMessage: the title on the first question', async () => {
-  resetMu();
-  await writeMessage({ conversationUri: CONVERSATION, content: 'Eerste vraag', title: 'Eerste vraag' });
-  const withTitle = state.updates[0];
-  assert.ok(withTitle.includes('<http://purl.org/dc/terms/title>'), 'the title triple');
-
-  resetMu();
-  await writeMessage({ conversationUri: CONVERSATION, content: 'Tweede vraag' });
-  const withoutTitle = state.updates[0];
-  assert.ok(!withoutTitle.includes('<http://purl.org/dc/terms/title>'), 'no title triple');
-});
-
-await check('writeMessage: an attachment without url is pending, with url is ready', async () => {
-  resetMu();
-  const { documents } = await writeMessage({
-    conversationUri: CONVERSATION, content: 'Rapport',
-    attachments: [{ name: 'rapport.csv', mediaType: 'text/csv' }],
-  });
-  const pending = state.updates[0];
-  assert.ok(pending.includes(documents[0].uri), 'the document is named');
-  assert.ok(pending.includes('<https://www.w3.org/ns/activitystreams#Document>'), 'as:Document');
-  assert.ok(!pending.includes('<https://www.w3.org/ns/activitystreams#url>'), 'no url yet');
-
-  resetMu();
-  await writeMessage({
-    conversationUri: CONVERSATION, content: 'Rapport',
-    attachments: [{ name: 'rapport.csv', mediaType: 'text/csv', url: '/files/1/download' }],
-  });
-  const ready = state.updates[0];
-  assert.ok(ready.includes('/files/1/download'), 'the url is written');
-});
-
-await check('setDocumentUrl and dropDocument name the document', async () => {
-  resetMu();
-  await setDocumentUrl(
-    'http://data.lblod.info/id/chat-documents/1', '/files/1/download', CONVERSATION);
-  assert.ok(state.updates[0].includes('http://data.lblod.info/id/chat-documents/1'));
-
-  resetMu();
-  await dropDocument('http://data.lblod.info/id/chat-documents/1');
-  assert.ok(state.updates[0].includes('http://data.lblod.info/id/chat-documents/1'));
-});
-
-await check('every recorded string parses as a SPARQL update', async () => {
-  resetMu();
-  await writeMessage({ conversationUri: CONVERSATION, content: 'Parsen', title: 'Parsen' });
-  await writeMessage({
-    conversationUri: CONVERSATION, content: 'Parsen',
-    attachments: [{ name: 'a.csv', mediaType: 'text/csv', url: '/files/a/download' }],
-  });
-  await setDocumentUrl('http://data.lblod.info/id/chat-documents/a', '/files/a/download', CONVERSATION);
-  await dropDocument('http://data.lblod.info/id/chat-documents/a');
-  const parser = new Parser();
-  for (const q of state.updates) {
-    assert.ok(parser.parse(q), 'parses');
-  }
-});
-
-process.exit(failures ? 1 : 0);
diff --git a/test/chat-turn.mjs b/test/chat-turn.mjs
deleted file mode 100644
index 12a0191..0000000
--- a/test/chat-turn.mjs
+++ /dev/null
@@ -1,100 +0,0 @@
-// Integration check for the turn endpoint (src/chat/index.js). No stack:
-// the mu stub records the queries and updates, and a handler steers the
-// answers, so the test asserts on the same SPARQL the template's helpers
-// would send.
-//
-//   npm test          (or: node --import ./dev-stubs/register.js test/chat-turn.mjs)
-
-import assert from 'node:assert/strict';
-import express from 'express';
-import { resetMu, setQueryHandler, state } from 'mu';
-
-let failures = 0;
-async function check(name, fn) {
-  try {
-    await fn();
-    console.log(`ok - ${name}`);
-  } catch (e) {
-    failures++;
-    console.error(`FAIL - ${name}\n    ${e.message}`);
-  }
-}
-
-// --- the stub answers -----------------------------------------------------------
-
-const KNOWN_ID = '11111111-1111-1111-1111-111111111111';
-const CONVERSATION = 'http://data.lblod.info/id/chat-conversations/9ab4';
-const ASSISTANT = 'http://data.lblod.info/id/chat-agents/rapportassistent';
-
-setQueryHandler((sparql) => {
-  if (sparql.includes('prov#SoftwareAgent')) {
-    return [{ agent: { value: ASSISTANT } }];
-  }
-  if (sparql.includes('sioc/ns#Thread') && sparql.includes(KNOWN_ID)) {
-    return [{ conversation: { value: CONVERSATION }, creator: { value: 'http://data.lblod.info/id/gebruiker/1' } }];
-  }
-  return [];
-});
-
-const { mountChat } = await import('../src/chat/index.js');
-const app = express();
-mountChat(app, {
-  path: '/assistant',
-  answer: async (turn) => {
-    return `Je schreef: ${turn.content}`;
-  },
-});
-const server = app.listen(0);
-const base = `http://localhost:${server.address().port}`;
-
-const post = (path, body) => fetch(`${base}${path}`, {
-  method: 'POST',
-  headers: { 'Content-Type': 'application/json', 'mu-session-id': 'http://mu.semte.ch/sessions/x' },
-  body: JSON.stringify(body),
-});
-
-await check('blank content is 400', async () => {
-  const res = await post('/assistant/conversations/00000000-0000-0000-0000-000000000000/turns', { content: '  ' });
-  assert.equal(res.status, 400);
-});
-
-await check('an unreadable conversation is 404', async () => {
-  const res = await post('/assistant/conversations/00000000-0000-0000-0000-000000000000/turns', { content: 'Hallo?' });
-  assert.equal(res.status, 404);
-});
-
-await check('a turn answers 202 with the message id, then writes the echo', async () => {
-  resetMu();
-  const res = await post(`/assistant/conversations/${KNOWN_ID}/turns`, { content: 'Hallo?' });
-  assert.equal(res.status, 202);
-  const { id } = await res.json();
-  assert.match(id, /^[0-9a-f-]{36}$/);
-
-  // the answer hook runs after the 202; give it a moment
-  await new Promise((r) => setTimeout(r, 200));
-  const updates = state.updates.map((u) => u);
-  assert.ok(updates.length >= 2, 'the question and the echo are written');
-  assert.ok(updates[0].includes('Hallo?'), 'the question first');
-  assert.ok(updates.some((u) => u.includes('Je schreef: Hallo?')), 'the echo after');
-});
-
-await check('a throwing hook writes the failure line', async () => {
-  const app2 = express();
-  mountChat(app2, { path: '/assistant', answer: async () => { throw new Error('boom'); } });
-  const server2 = app2.listen(0);
-  const base2 = `http://localhost:${server2.address().port}`;
-  resetMu();
-  const res = await fetch(`${base2}/assistant/conversations/${KNOWN_ID}/turns`, {
-    method: 'POST',
-    headers: { 'Content-Type': 'application/json', 'mu-session-id': 'http://mu.semte.ch/sessions/x' },
-    body: JSON.stringify({ content: 'Breekt dit?' }),
-  });
-  assert.equal(res.status, 202);
-  await new Promise((r) => setTimeout(r, 200));
-  assert.ok(state.updates.some((u) => u.includes('Er ging iets mis. Probeer het opnieuw.')),
-    'the failure message is written');
-  server2.close();
-});
-
-server.close();
-process.exit(failures ? 1 : 0);
diff --git a/test/import-boundaries.mjs b/test/import-boundaries.mjs
deleted file mode 100644
index 8be197a..0000000
--- a/test/import-boundaries.mjs
+++ /dev/null
@@ -1,43 +0,0 @@
-// node --import ./dev-stubs/register.js <test file>
-// (this file itself needs no 'mu', so it runs without the register hook)
-//
-// The drop-in guarantee (plan step 1.1): src/chat/ imports nothing from the
-// rest of this service, and nothing there imports it back.
-import { readdirSync, readFileSync, statSync } from 'node:fs';
-import { join, dirname, relative } from 'node:path';
-import { fileURLToPath } from 'node:url';
-
-const root = join(dirname(fileURLToPath(import.meta.url)), '..');
-const CHAT = join(root, 'src', 'chat');
-const BACK = join(root, 'src', 'runner'), LLM = join(root, 'src', 'llm'), DB = join(root, 'src', 'db.js');
-
-function walk(dir) {
-  return readdirSync(dir).flatMap(f => {
-    const p = join(dir, f);
-    return statSync(p).isDirectory() ? walk(p) : [p];
-  });
-}
-
-let bad = 0;
-for (const f of walk(CHAT)) {
-  const text = readFileSync(f, 'utf8');
-  for (const m of text.matchAll(/from\s+['"](\.[^'"]+)['"]/g)) {
-    const target = new URL(m[1], 'file://' + f).pathname;
-    if (target === DB || target.startsWith(BACK) || target.startsWith(LLM)) {
-      console.error(`FAIL - ${relative(root, f)} imports ${relative(root, target)}`);
-      bad++;
-    }
-  }
-}
-for (const dir of [BACK, LLM]) {
-  for (const f of walk(dir)) {
-    const text = readFileSync(f, 'utf8');
-    if (/from\s+['"]\.\.\/chat/.test(text)) {
-      console.error(`FAIL - ${relative(root, f)} imports the chat back`);
-      bad++;
-    }
-  }
-}
-
-console.log(bad ? `${bad} boundary violations` : 'ok - chat keeps to itself');
-process.exit(bad ? 1 : 0);