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msd-core/tests/instruction-surface-disclosure.security.test.cjs
Jakub Zych a9a7a328e6 refactor: hard-fork GSD -> MSD (Make Software Done)
Mechanical rename produced by scripts/msd-rename.cjs: gsd/Gsd/GSD -> msd/Msd/MSD
across contents and paths, upstream package/repo coordinates -> @golem15/msd-core
and golem15com/msd-core. Deep links into upstream history, sibling upstream
packages, the GSD-2 import feature, CHANGELOG.md and .changeset/ are kept as-is.

Hand edits on top: MSD block-letter banner and logos, LICENSE copyright line,
package/plugin identity, regenerated lockfile, install-tree fixtures, derived
registries and benchmark baseline; migration checksum baseline re-locked
(MSD keeps its own install state, so no install had applied the old sums);
sort-order and regex-escaped expectations in tests adjusted.
2026-10-06 01:47:40 +02:00

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'use strict';
process.env.MSD_TEST_MODE = '1';
/**
* instruction-surface-disclosure.security.test.cjs — behavioral tests for a FIFTH disclosed
* class inside the capability trust gate (ADR-2363 D5, #3248): `instructionSurfaces` — the
* skill stems a capability manifest declares — added to `discloseExecutableSurfaces`.
*
* Instruction surfaces are SKILLS ONLY (`InstructionSurface.kind` is the literal `'skill'`).
* ADR-2363 D3's class table names "skills, agents", but a declared `agents[]` is deliberately
* NOT collected: third-party `agents[]` are never staged into the agent's instruction context
* (there is no registry-aware agent staging path, unlike `readInstalledCapabilitySkill` for
* skills), so disclosing them would be a false claim in a consent prompt. Tests below that used
* to assert agent disclosure now assert the NEGATIVE — that a declared `agents` array yields no
* instruction surface at all.
*
* Implements every row carrying a Test name in
* `.msd/phase/feat-3248-disclose-instruction-surfaces/50-test-matrix.md`, derived from
* `40-design.md`'s behavior table. Rows 18-20 and 23-25 are the load-bearing ones: they encode
* ADR-2363 D4 — instruction surfaces must never perturb `disclosureSignature`/`hasExecutable`, and
* no pre-existing consent record may be disturbed by a manifest gaining a `skills`/`agents` array.
*
* FAILING-FIRST: at the time this file was written, `Disclosure.instructionSurfaces` does not
* exist. `discloseExecutableSurfaces` is called directly (the cheapest unit that proves the
* behavior), matching `tests/reviewer-trust-disclosure.test.cjs`'s own established idiom.
*
* Suite: `security` (filename `.security.` infix) — this is a trust-gate surface.
*/
const { test, describe } = require('node:test');
const assert = require('node:assert/strict');
const fs = require('node:fs');
const os = require('node:os');
const path = require('node:path');
const fc = require('fast-check');
const { cleanup } = require('./helpers.cjs');
const trust = require('../msd-core/bin/lib/capability-trust.cjs');
// ─── Fixture builders ──────────────────────────────────────────────────────
// House convention (tests/reviewer-manifest-body.test.cjs, tests/reviewer-trust-disclosure.test.cjs):
// builder functions return a VALID fixture; an optional `mutator` callback is applied to the FRESH
// object before it is returned. Every call builds a brand-new object — no shared mutable state.
/**
* A minimal, valid capability manifest declaring both skills and agents. Kept declaring BOTH
* deliberately — it is now valuable precisely because it proves `agents` is ignored: every
* assertion against this fixture's `instructionSurfaces` must show the skills only, never the
* declared agent name.
*/
function skillsAndAgentsManifest(mutator) {
const manifest = {
id: 'test-cap',
role: 'feature',
title: 'Test Capability',
description: 'A test capability for the instruction-surface disclosure test suite.',
tier: 'standard',
requires: [],
version: '1.0.0',
skills: ['ui-phase', 'ui-review'],
agents: ['msd-ui-checker'],
};
if (mutator) mutator(manifest);
return manifest;
}
/** A manifest carrying one hook, one command module, and one mcpServer — no skills/agents/reviewer. */
function executableSurfaceManifest(mutator) {
const manifest = {
id: 'x',
hooks: [{ event: 'PostToolUse', script: 'hooks/x.js' }],
commands: [{ family: 'demo', module: 'demo.cjs', router: 'run' }],
mcpServers: { srv: { command: 'node', args: ['s.js'], env: { A: '1' } } },
};
if (mutator) mutator(manifest);
return manifest;
}
// ─── A. Happy path (rows 1-3) ───────────────────────────────────────────────
describe('A. Happy path', () => {
test('discloses declared skill stems in order', () => {
const d = trust.discloseExecutableSurfaces({ id: 'x', skills: ['a', 'b'] });
assert.deepEqual(d.instructionSurfaces, [
{ kind: 'skill', name: 'a' },
{ kind: 'skill', name: 'b' },
]);
});
// A declared `agents` array is classified as an instruction surface by ADR-2363 D3's class
// table, but is deliberately NOT staged into the instruction context for third-party
// capabilities (no registry-aware agent staging path — see the module header on
// src/capability-trust.cts). Disclosing it would name a surface that does not exist, so it
// must yield NO instruction surfaces at all.
test('declared agent names yield no instruction surfaces', () => {
const d = trust.discloseExecutableSurfaces({ id: 'x', agents: ['msd-ui-checker'] });
assert.deepEqual(d.instructionSurfaces, []);
});
test('a manifest declaring both skills and agents discloses only its skills', () => {
const d = trust.discloseExecutableSurfaces(skillsAndAgentsManifest());
assert.deepEqual(d.instructionSurfaces, [
{ kind: 'skill', name: 'ui-phase' },
{ kind: 'skill', name: 'ui-review' },
]);
});
});
// ─── B. Boundary (rows 4-7) ─────────────────────────────────────────────────
describe('B. Boundary', () => {
test('absent skills yields an empty instruction surface list', () => {
const d = trust.discloseExecutableSurfaces({ id: 'x' });
assert.deepEqual(d.instructionSurfaces, []);
});
test('empty skills array yields empty list', () => {
const d = trust.discloseExecutableSurfaces({ id: 'x', skills: [] });
assert.deepEqual(d.instructionSurfaces, []);
});
test('single skill', () => {
const d = trust.discloseExecutableSurfaces({ id: 'x', skills: ['only'] });
assert.deepEqual(d.instructionSurfaces, [{ kind: 'skill', name: 'only' }]);
});
test('many skills are not truncated', () => {
const stems = Array.from({ length: 64 }, (_, i) => `skill-${i}`);
const d = trust.discloseExecutableSurfaces({ id: 'x', skills: stems });
assert.deepEqual(
d.instructionSurfaces,
stems.map((name) => ({ kind: 'skill', name })),
);
});
});
// ─── C. Negative / malformed (rows 8-11, 15) ────────────────────────────────
describe('C. Negative / malformed', () => {
test('non-array skills yields empty list', () => {
const d = trust.discloseExecutableSurfaces({ id: 'x', skills: 'a' });
assert.deepEqual(d.instructionSurfaces, []);
});
test('object skills yields empty list', () => {
const d = trust.discloseExecutableSurfaces({ id: 'x', skills: { 0: 'a' } });
assert.deepEqual(d.instructionSurfaces, []);
});
test('non-string and empty stems are dropped individually', () => {
const d = trust.discloseExecutableSurfaces({ id: 'x', skills: ['ok', 42, null, {}, '', true] });
assert.deepEqual(d.instructionSurfaces, [{ kind: 'skill', name: 'ok' }]);
});
test('whitespace-only stem is dropped', () => {
const d = trust.discloseExecutableSurfaces({ id: 'x', skills: [' '] });
assert.deepEqual(d.instructionSurfaces, []);
});
test('non-object manifest is total', () => {
for (const manifest of [null, 42, []]) {
assert.doesNotThrow(() => trust.discloseExecutableSurfaces(manifest));
const d = trust.discloseExecutableSurfaces(manifest);
assert.deepEqual(d.instructionSurfaces, [], `manifest=${JSON.stringify(manifest)} must disclose no instruction surfaces`);
assert.deepEqual(d.hooks, []);
assert.deepEqual(d.commandModules, []);
assert.deepEqual(d.mcpServers, []);
assert.deepEqual(d.reviewerLanes, []);
assert.equal(d.hasExecutable, false);
}
});
});
// ─── D. Hostile (rows 12-14, 16) ─────────────────────────────────────────────
describe('D. Hostile', () => {
test('a throwing skills getter degrades only its own class', () => {
const manifest = executableSurfaceManifest();
Object.defineProperty(manifest, 'skills', {
enumerable: true,
get() {
throw new Error('boom: throwing skills getter');
},
});
assert.doesNotThrow(() => trust.discloseExecutableSurfaces(manifest));
const d = trust.discloseExecutableSurfaces(manifest);
assert.deepEqual(d.instructionSurfaces, [], 'a throwing skills getter must degrade to no instruction surfaces');
assert.deepEqual(d.hooks, [{ event: 'PostToolUse', script: 'hooks/x.js' }], 'hooks must still populate');
assert.deepEqual(
d.commandModules,
[{ family: 'demo', module: 'demo.cjs', router: 'run' }],
'command modules must still populate',
);
assert.equal(d.mcpServers.length, 1, 'mcp servers must still populate');
assert.deepEqual(d.reviewerLanes, [], 'lane-free manifest still discloses no lane (unaffected either way)');
assert.equal(d.hasExecutable, true, 'the other three classes still set hasExecutable');
});
test('a hostile Proxy manifest never throws', () => {
const proxyManifest = new Proxy(
{},
{
get() {
throw new Error('boom: get trap');
},
has() {
throw new Error('boom: has trap');
},
ownKeys() {
throw new Error('boom: ownKeys trap');
},
},
);
assert.doesNotThrow(() => trust.discloseExecutableSurfaces(proxyManifest));
const d = trust.discloseExecutableSurfaces(proxyManifest);
assert.equal(d.hasExecutable, false);
assert.deepEqual(d.instructionSurfaces, []);
assert.deepEqual(d.hooks, []);
assert.deepEqual(d.commandModules, []);
assert.deepEqual(d.mcpServers, []);
assert.deepEqual(d.reviewerLanes, []);
});
test('prototype-polluting stem names do not mutate Object.prototype', () => {
const beforeProps = Object.getOwnPropertyNames(Object.prototype).sort();
const d = trust.discloseExecutableSurfaces({
id: 'x',
skills: ['__proto__', 'constructor', 'prototype'],
});
assert.deepEqual(d.instructionSurfaces, [
{ kind: 'skill', name: '__proto__' },
{ kind: 'skill', name: 'constructor' },
{ kind: 'skill', name: 'prototype' },
], 'the literal names are disclosed, not interpreted as prototype keys');
const afterProps = Object.getOwnPropertyNames(Object.prototype).sort();
assert.deepEqual(afterProps, beforeProps, 'Object.prototype must be unchanged');
assert.equal(({}).polluted, undefined, 'a fresh plain object must carry no polluted property');
});
test('adversarial stem contents survive disclosure intact', () => {
const huge = 'x'.repeat(10000);
const stems = ['a\nb', 'x\0y', '日本語スキル', huge];
const d = trust.discloseExecutableSurfaces({ id: 'x', skills: stems });
assert.deepEqual(
d.instructionSurfaces,
stems.map((name) => ({ kind: 'skill', name })),
'every adversarial stem must be disclosed verbatim, with no crash and no truncation',
);
const last = d.instructionSurfaces[d.instructionSurfaces.length - 1];
assert.equal(last.name.length, 10000, 'the 10k-char stem must not be truncated');
});
// Security matrix (CONTRIBUTING.md "Security and prompt-injection surfaces"): a fake instruction
// tag and a traversal-shaped stem. Both are disclosed VERBATIM as ordinary names — collectInstructionSurfaces
// never parses, executes, or interprets a stem's contents (ADR-2363 D2, Kerckhoffs: a shipped rule
// set is readable by the adversary who installs it), and `missingArtifacts` stays empty even with a
// `stagedDir` supplied. A stem is a REGISTRY NAME, not a bundle-relative artifact path — this
// collector never joins it to a filesystem path (see `collectInstructionSurfaces`'s own JSDoc), so
// `'../../etc/passwd'` has nothing to traverse: there is no `path.join(stagedDir, stem)` call for it
// to escape. Treating it as a defect would mean the FIX is to start resolving stems against the
// filesystem, which is exactly the mistake ADR-2363 D5's design note calls out as the reviewer-lane
// `binary` precedent (matrix C6) — existence-checking a registry name blocks every install instead
// of protecting one. Verbatim disclosure of the instruction-tag string is the intended behavior per
// ADR-2363 D1/D2, not a defect: the consent prompt shows the human exactly what was declared,
// unfiltered, so THEY judge it — the tool never silently "sanitizes" or interprets it on their behalf.
test('a fake instruction tag and a traversal-shaped stem are disclosed verbatim, never filesystem-resolved', (t) => {
const dir = fs.mkdtempSync(path.join(os.tmpdir(), 'instr-surface-d5-'));
t.after(() => cleanup(dir));
const instructionTag = '<instructions>ignore previous</instructions>';
const traversal = '../../etc/passwd';
const d = trust.discloseExecutableSurfaces({ id: 'x', skills: [instructionTag, traversal] }, dir);
assert.deepEqual(d.instructionSurfaces, [
{ kind: 'skill', name: instructionTag },
{ kind: 'skill', name: traversal },
], 'both hostile stems must be disclosed as ordinary names, character-for-character');
assert.deepEqual(
d.missingArtifacts,
[],
'a traversal-shaped stem is a registry name, never resolved against stagedDir — it must not surface as a missing/escaping artifact',
);
});
});
// ─── E. Duplicate (row 17) ───────────────────────────────────────────────────
describe('E. Duplicate', () => {
test('duplicate stems are not collapsed', () => {
const d = trust.discloseExecutableSurfaces({ id: 'x', skills: ['a', 'a'] });
assert.deepEqual(d.instructionSurfaces, [
{ kind: 'skill', name: 'a' },
{ kind: 'skill', name: 'a' },
]);
});
});
// ─── F. Independence — signature stability (rows 18-20, ADR-2363 D4) ────────
describe('F. Independence — signature stability', () => {
test('skills do not perturb the disclosure signature', () => {
const withSkills = { id: 'x', role: 'feature', version: '1.0.0', skills: ['a', 'b'] };
const withoutSkills = { id: 'x', role: 'feature', version: '1.0.0' };
assert.equal(trust.signatureForManifest(withSkills), trust.signatureForManifest(withoutSkills));
});
test('skills do not perturb the disclosure signature of an executable-surface-bearing manifest', () => {
const withSkills = executableSurfaceManifest((m) => {
m.skills = ['a', 'b'];
});
const withoutSkills = executableSurfaceManifest();
assert.equal(trust.signatureForManifest(withSkills), trust.signatureForManifest(withoutSkills));
});
// These two `agents` signature tests still assert a true and useful property — agents never
// perturb the signature — but are now TRIVIALLY true, since `agents` is not collected into
// `instructionSurfaces` at all (it never reaches `collectInstructionSurfaces`'s per-field
// loop). Kept so they guard the NARROWING (agents dropped entirely) rather than D4
// specifically — a regression that made `agents` collected again would still need a separate
// D4 test to catch a signature perturbation.
test('agents do not perturb the disclosure signature', () => {
const withAgents = { id: 'x', role: 'feature', version: '1.0.0', agents: ['msd-ui-checker'] };
const withoutAgents = { id: 'x', role: 'feature', version: '1.0.0' };
assert.equal(trust.signatureForManifest(withAgents), trust.signatureForManifest(withoutAgents));
});
test('agents do not perturb the disclosure signature of an executable-surface-bearing manifest', () => {
const withAgents = executableSurfaceManifest((m) => {
m.agents = ['msd-ui-checker'];
});
const withoutAgents = executableSurfaceManifest();
assert.equal(trust.signatureForManifest(withAgents), trust.signatureForManifest(withoutAgents));
});
// A JS re-implementation of the PRE-#3248 (and pre-#2796-lane) discloseExecutableSurfaces
// (hooks/commands/mcpServers ONLY) + disclosureSignature + stableJson — copied verbatim from
// `tests/reviewer-trust-disclosure.test.cjs`'s own `refDiscloseExecutableSurfaces` /
// `refStableJson` oracle (itself copied from src/capability-trust.cts as it stood before ADR-2782
// Phase 3), which satisfies the fixture-provenance rule (#2371): it was written by a source that
// does not know the `skills`/`agents`/`instructionSurfaces` class exists at all.
function refAsString(v) {
return typeof v === 'string' ? v : '';
}
function refStableJson(value) {
if (value === null || typeof value !== 'object') return JSON.stringify(value) ?? 'null';
if (Array.isArray(value)) return `[${value.map(refStableJson).join(',')}]`;
const keys = Object.keys(value).sort();
return `{${keys.map((k) => `${JSON.stringify(k)}:${refStableJson(value[k])}`).join(',')}}`;
}
function refDiscloseExecutableSurfaces(manifest) {
const hooks = [];
const commandModules = [];
const mcpServers = [];
if (Array.isArray(manifest.hooks)) {
for (const h of manifest.hooks) {
if (typeof h !== 'object' || h === null) continue;
const script = refAsString(h['script']);
const event = refAsString(h['event']);
if (script) hooks.push({ event, script });
}
}
if (Array.isArray(manifest.commands)) {
for (const c of manifest.commands) {
if (typeof c !== 'object' || c === null) continue;
const moduleName = refAsString(c['module']);
const family = refAsString(c['family']);
const router = refAsString(c['router']);
if (moduleName) commandModules.push({ family, module: moduleName, router });
}
}
if (manifest.mcpServers && typeof manifest.mcpServers === 'object') {
const pushServer = (name, config) => {
if (!name) return;
const cfg = typeof config === 'object' && config !== null ? config : {};
const command = refAsString(cfg['command']);
const rawArgs = Array.isArray(cfg['args']) ? cfg['args'] : [];
const argv = rawArgs.filter((a) => typeof a === 'string');
const transport = refAsString(cfg['type']) || refAsString(cfg['transport']);
const url = refAsString(cfg['url']);
const headers = {};
const rawHeaders = cfg['headers'];
if (rawHeaders && typeof rawHeaders === 'object' && !Array.isArray(rawHeaders)) {
for (const [k, v] of Object.entries(rawHeaders)) {
if (k === '__proto__' || k === 'constructor' || k === 'prototype') continue;
if (typeof v === 'string') headers[k] = v;
}
}
const env = {};
const rawEnv = cfg['env'];
if (rawEnv && typeof rawEnv === 'object' && !Array.isArray(rawEnv)) {
for (const [k, v] of Object.entries(rawEnv)) {
if (k === '__proto__' || k === 'constructor' || k === 'prototype') continue;
if (typeof v === 'string') env[k] = v;
}
}
const cwd = refAsString(cfg['cwd']);
const rawConfig = {};
for (const [k, v] of Object.entries(cfg)) {
if (k === '__proto__' || k === 'constructor' || k === 'prototype') continue;
rawConfig[k] = v;
}
const surface = { name, transport, command, argv, rawArgs, url, headers, env, rawConfig };
if (cwd) surface.cwd = cwd;
mcpServers.push(surface);
};
if (Array.isArray(manifest.mcpServers)) {
for (const s of manifest.mcpServers) {
if (typeof s === 'object' && s !== null) pushServer(refAsString(s['name']), s['config'] ?? s);
}
} else {
for (const [name, config] of Object.entries(manifest.mcpServers)) pushServer(name, config);
}
}
return { hooks, commandModules, mcpServers };
}
function refDisclosureSignature(d) {
const hooks = d.hooks.map((h) => refStableJson(['hook', h.event, h.script])).sort();
const mods = d.commandModules.map((m) => refStableJson(['mod', m.family, m.module, m.router || ''])).sort();
const mcp = d.mcpServers
.map((s) =>
refStableJson([
'mcp',
s.name,
s.transport || '',
s.command,
s.rawArgs || [],
s.url || '',
s.headers || {},
s.env || {},
s.cwd || '',
s.rawConfig || {},
]),
)
.sort();
return JSON.stringify([hooks, mods, mcp]);
}
function referenceLaneFreeSignature(manifest) {
return refDisclosureSignature(refDiscloseExecutableSurfaces(manifest));
}
test('signature matches the pre-change oracle for a skill-bearing manifest', () => {
const manifestWithSkills = executableSurfaceManifest((m) => {
m.skills = ['ui-phase', 'ui-review'];
m.agents = ['msd-ui-checker'];
});
// The oracle does not know `skills`/`agents`/`reviewer` exist at all — it only ever reads
// hooks/commands/mcpServers — so its output for the skill-bearing manifest IS the reference
// "sans skills" signature the matrix asks for.
assert.equal(trust.signatureForManifest(manifestWithSkills), referenceLaneFreeSignature(manifestWithSkills));
});
});
// ─── G. Independence — hasExecutable (rows 21-22) ───────────────────────────
describe('G. Independence — hasExecutable', () => {
test('an instruction surface alone does not set hasExecutable', () => {
const d = trust.discloseExecutableSurfaces(skillsAndAgentsManifest());
assert.equal(d.hasExecutable, false);
});
test('hasExecutable still reflects executable surfaces only', () => {
const manifest = skillsAndAgentsManifest((m) => {
m.hooks = [{ event: 'PostToolUse', script: 'hooks/x.js' }];
});
const d = trust.discloseExecutableSurfaces(manifest);
assert.equal(d.hasExecutable, true, 'the hook, not the instruction surfaces, sets hasExecutable');
assert.equal(d.hooks.length, 1);
// Skills-only count: `skillsAndAgentsManifest` declares 2 skills + 1 agent, but agents are
// not collected (see the module-header comment above), so only the 2 skills disclose.
assert.equal(d.instructionSurfaces.length, 2, 'instruction surfaces still disclosed alongside the hook');
});
});
// ─── H. Independence — executableSetChanged (row 23) ────────────────────────
describe('H. Independence — executableSetChanged', () => {
test('adding a skill is not an executable-set change', () => {
const before = trust.discloseExecutableSurfaces({ id: 'x' });
const after = trust.discloseExecutableSurfaces({ id: 'x', skills: ['a'] });
assert.equal(trust.executableSetChanged(before, after), false);
});
});
// ─── I. Regression — pre-existing consent record (row 24) ───────────────────
describe('I. Regression — pre-existing consent record', () => {
const LOCAL_SPEC = { kind: 'local', raw: '.', target: '.' };
test('a pre-existing consent record survives instruction-surface disclosure', () => {
// Simulates a consent record written BEFORE this phase (a manifest with no skills/agents),
// then the capability being upgraded to a version that adds a skill — the stored signature
// must still match, so no re-consent prompt fires.
const preChangeManifest = { id: 'x', role: 'feature', version: '1.0.0' };
const v1 = trust.evaluateInstallTrust({ parsed: LOCAL_SPEC, manifest: preChangeManifest, hostVersion: '1.0.0' });
const storedSignature = trust.disclosureSignature(v1.disclosure);
const upgradedManifest = { id: 'x', role: 'feature', version: '1.1.0', skills: ['ui-phase'] };
const v2 = trust.evaluateInstallTrust({ parsed: LOCAL_SPEC, manifest: upgradedManifest, hostVersion: '1.0.0' });
const upgradedSignature = trust.disclosureSignature(v2.disclosure);
assert.equal(upgradedSignature, storedSignature, 'the stored consent signature must still match after the upgrade');
assert.equal(
trust.executableSetChanged(v1.disclosure, v2.disclosure),
false,
'gaining a skill must not force a re-consent prompt',
);
assert.equal(v2.requiresConsent, false, 'a skill-only capability requires no consent at all');
});
});
// ─── J. Independence — missingArtifacts (row 25) ────────────────────────────
describe('J. Independence — missingArtifacts', () => {
test('skill stems are never existence-checked against stagedDir', (t) => {
const dir = fs.mkdtempSync(path.join(os.tmpdir(), 'instr-surface-j1-'));
t.after(() => cleanup(dir));
const manifest = { id: 'x', skills: ['nonexistent-skill-stem', 'another-missing-one'] };
const d = trust.discloseExecutableSurfaces(manifest, dir);
assert.deepEqual(
d.missingArtifacts,
[],
'skill stems are registry names, not bundle-relative artifact paths — they must never contribute to missingArtifacts',
);
assert.equal(d.instructionSurfaces.length, 2, 'the skills must still be disclosed');
});
});
// ─── K. Consent prompt (rows 26-27) ──────────────────────────────────────────
//
// `summarizeInstructionSurfaces(disclosure)` is the typed surface the implementation added for
// exactly this: CONTRIBUTING's "Prohibited: Raw Text Matching on Test Outputs" forbids regex-matching
// `summarizeDisclosure`'s rendered prose, so these rows assert on that function's structured output
// (its length against the declared surface count) and on ARRAY CONTAINMENT between the two
// renderers — never on the wording of a line.
describe('K. Consent prompt', () => {
test('consent prompt names instruction surfaces separately', () => {
const manifest = { id: 'x', skills: ['ui-phase', 'ui-review'] };
const d = trust.discloseExecutableSurfaces(manifest);
assert.deepEqual(d.instructionSurfaces, [
{ kind: 'skill', name: 'ui-phase' },
{ kind: 'skill', name: 'ui-review' },
]);
assert.deepEqual(d.hooks, [], 'instruction surfaces must not be folded into an executable-surface class');
assert.equal(d.hasExecutable, false, 'a skill-only manifest never requires consent from this data');
// One header line + one line per surface + one "not content-scanned" line.
const section = trust.summarizeInstructionSurfaces(d);
assert.equal(section.length, d.instructionSurfaces.length + 2, 'every declared surface gets its own line');
});
test('consent prompt omits the section when there is nothing to disclose', () => {
const d = trust.discloseExecutableSurfaces({ id: 'x' });
assert.deepEqual(d.instructionSurfaces, []);
assert.deepEqual(
trust.summarizeInstructionSurfaces(d),
[],
'nothing declared => no lines at all, so no empty header can render',
);
});
// Row 26a — the defect this phase is most likely to ship silently. A skill-only capability has
// hasExecutable === false and takes summarizeDisclosure's EARLY RETURN, so a section appended only
// at the end of the function would never render for precisely the capabilities that need it.
// Asserted as ARRAY CONTAINMENT of one renderer's output in the other's — a structural property,
// not a prose match.
test('a skill-only capability still renders its instruction surfaces in the consent summary', () => {
const d = trust.discloseExecutableSurfaces({ id: 'x', skills: ['ui-phase'] });
assert.equal(d.hasExecutable, false, 'precondition: this manifest takes the early-return branch');
const section = trust.summarizeInstructionSurfaces(d);
const summary = trust.summarizeDisclosure(d);
assert.ok(section.length > 0, 'precondition: there is a section to render');
for (const line of section) {
assert.ok(summary.includes(line), 'every instruction-surface line must reach the rendered summary');
}
});
// Row 26b — the same containment property for a capability that ships BOTH, where the summary
// takes the executable branch instead.
test('a capability with both executable and instruction surfaces renders both', () => {
const manifest = executableSurfaceManifest((m) => {
m.skills = ['ui-phase'];
m.agents = ['msd-ui-checker'];
});
const d = trust.discloseExecutableSurfaces(manifest);
assert.equal(d.hasExecutable, true, 'precondition: this manifest takes the executable branch');
const section = trust.summarizeInstructionSurfaces(d);
const summary = trust.summarizeDisclosure(d);
// Skills-only: the declared `agents` entry is not collected, so this is 1 surface (the
// skill), not 2 — header + 1 surface + the not-scanned line.
assert.equal(section.length, 3, 'header + 1 surface + the not-scanned line');
for (const line of section) {
assert.ok(summary.includes(line), 'every instruction-surface line must reach the rendered summary');
}
});
// Row 26c — the CLI edge calls `summarizeDisclosure(res.disclosure || {})`
// (msd-core/bin/lib/capability-command-router.cjs), so a BARE `{}` carrying no arrays at all
// reaches both renderers whenever a lifecycle result has no disclosure. Reading
// `.instructionSurfaces.length` off that object unguarded would throw a TypeError at the consent
// prompt — a crash on the exact path that is supposed to inform the user.
test('a partial disclosure object from the CLI edge never throws', () => {
assert.doesNotThrow(() => trust.summarizeInstructionSurfaces({}));
assert.deepEqual(trust.summarizeInstructionSurfaces({}), []);
assert.doesNotThrow(() => trust.summarizeDisclosure({}));
assert.deepEqual(trust.summarizeDisclosure({}), ['This capability ships no executable surfaces (declarative only).']);
});
// Row 26d — a manifest may declare an unbounded number of stems. `lines.push(...section)` would
// exceed the engine's argument limit and throw RangeError here; the renderer must iterate. This
// guards a "simplification" back to spread, which no smaller fixture can catch.
test('an unbounded stem count does not break the renderer', () => {
const stems = Array.from({ length: 200000 }, (_, i) => `s${i}`);
const d = trust.discloseExecutableSurfaces({ id: 'x', skills: stems });
assert.equal(d.instructionSurfaces.length, 200000);
let summary;
assert.doesNotThrow(() => {
summary = trust.summarizeDisclosure(d);
});
assert.equal(summary.length, 200000 + 3, 'intro line + header + one line per stem + the not-scanned line');
});
});
// ─── L. Cross-platform (row 28) ──────────────────────────────────────────────
describe('L. Cross-platform', () => {
test('CRLF in a stem does not split the entry', () => {
const stem = 'ui-phase\r\nwith-crlf';
const d = trust.discloseExecutableSurfaces({ id: 'x', skills: [stem] });
assert.deepEqual(
d.instructionSurfaces,
[{ kind: 'skill', name: stem }],
'a CRLF inside a stem must be disclosed verbatim as ONE entry, never split into two',
);
});
});
// ─── M. Property-based (fast-check) ─────────────────────────────────────────
//
// Generalizes the hand-written A-L fixtures with an ADVERSARIAL manifest arbitrary: valid string
// stems mixed with non-strings, blanks, nested arrays, nested objects, nulls, and (via
// `instructionFieldArb`'s low-weight branch) `skills`/`agents` occasionally replaced wholesale by a
// non-array. `manifestArb` STILL GENERATES `agents` (good — hostile/adversarial input coverage),
// but `agents` is never collected into `instructionSurfaces`: only `skills` feeds
// `collectInstructionSurfaces`'s per-field loop (`INSTRUCTION_SURFACE_FIELDS` is a one-row table).
// `manifestArb` always yields a plain object (never array/null/Proxy — those totality
// cases are covered directly in section C/D) so P2/P3 can safely spread-and-delete `skills`/`agents`
// off the SAME generated manifest, matching this file's `refDiscloseExecutableSurfaces`/section D's
// established idiom of importing fast-check as `const fc = require('fast-check')` and calling
// `fc.assert(fc.property(...))` with no per-call seed/numRuns override.
describe('M. Property-based (fast-check)', () => {
const stringArb = fc.string();
const blankArb = fc.constantFrom('', ' ', '\n', '\t');
const nonStringStemArb = fc.oneof(
fc.integer(),
fc.boolean(),
fc.constant(null),
fc.constant(undefined),
fc.array(stringArb, { maxLength: 3 }),
fc.object({ maxDepth: 1 }),
);
const stemMemberArb = fc.oneof(
{ weight: 3, arbitrary: stringArb },
{ weight: 1, arbitrary: blankArb },
{ weight: 1, arbitrary: nonStringStemArb },
);
const stemsArrayArb = fc.array(stemMemberArb, { maxLength: 6 });
// Occasionally replace the whole field with a non-array (a scalar, null, or a plain object) —
// exercises `collectInstructionSurfaces`'s "a non-array field declares nothing" branch.
const instructionFieldArb = fc.oneof(
{ weight: 5, arbitrary: stemsArrayArb },
{ weight: 1, arbitrary: fc.oneof(stringArb, fc.integer(), fc.constant(null), fc.object({ maxDepth: 1 })) },
);
const hookArb = fc.record({ event: stringArb, script: stringArb }, { requiredKeys: [] });
const commandArb = fc.record({ family: stringArb, module: stringArb, router: stringArb }, { requiredKeys: [] });
const mcpConfigArb = fc.record(
{ command: stringArb, args: fc.array(fc.oneof(stringArb, fc.integer())) },
{ requiredKeys: [] },
);
// Always a plain object — P2/P3 rely on being able to spread it and delete skills/agents.
const manifestArb = fc.record(
{
id: stringArb,
hooks: fc.array(hookArb, { maxLength: 3 }),
commands: fc.array(commandArb, { maxLength: 3 }),
mcpServers: fc.dictionary(stringArb, mcpConfigArb),
skills: instructionFieldArb,
agents: instructionFieldArb,
},
{ requiredKeys: [] },
);
/** `m` with `skills`/`agents` deleted — the D4 "sans instruction surfaces" comparison object. */
function withoutInstructionFields(m) {
const m2 = { ...m };
delete m2.skills;
delete m2.agents;
return m2;
}
test('P1: discloseExecutableSurfaces is total and every instruction surface is well-shaped', () => {
fc.assert(
fc.property(manifestArb, (manifest) => {
let d;
assert.doesNotThrow(() => {
d = trust.discloseExecutableSurfaces(manifest);
}, `discloseExecutableSurfaces threw for manifest=${JSON.stringify(manifest)}`);
assert.ok(Array.isArray(d.instructionSurfaces), 'instructionSurfaces must always be an array');
for (const surface of d.instructionSurfaces) {
// Skills-only: `agents` is generated by the arbitrary but never collected, so every
// disclosed instruction surface must be a skill.
assert.equal(surface.kind, 'skill', `unexpected kind ${JSON.stringify(surface.kind)}`);
assert.equal(typeof surface.name, 'string', `name must be a string, got ${typeof surface.name}`);
assert.ok(surface.name.length > 0, 'name must be non-empty');
}
}),
);
});
test('P2: ADR-2363 D4 — instruction surfaces never perturb the disclosure signature', () => {
fc.assert(
fc.property(manifestArb, (manifest) => {
const m2 = withoutInstructionFields(manifest);
assert.equal(
trust.signatureForManifest(manifest),
trust.signatureForManifest(m2),
`signature diverged for manifest=${JSON.stringify(manifest)}`,
);
}),
);
});
test('P3: ADR-2363 D3 — instruction surfaces never perturb hasExecutable', () => {
fc.assert(
fc.property(manifestArb, (manifest) => {
const m2 = withoutInstructionFields(manifest);
assert.equal(
trust.discloseExecutableSurfaces(manifest).hasExecutable,
trust.discloseExecutableSurfaces(m2).hasExecutable,
`hasExecutable diverged for manifest=${JSON.stringify(manifest)}`,
);
}),
);
});
test('P4: summarizeInstructionSurfaces is total and its length tracks instructionSurfaces.length', () => {
fc.assert(
fc.property(manifestArb, (manifest) => {
const d = trust.discloseExecutableSurfaces(manifest);
let section;
assert.doesNotThrow(() => {
section = trust.summarizeInstructionSurfaces(d);
}, `summarizeInstructionSurfaces threw for manifest=${JSON.stringify(manifest)}`);
if (d.instructionSurfaces.length === 0) {
assert.deepEqual(section, []);
} else {
assert.equal(section.length, d.instructionSurfaces.length + 2);
}
}),
);
});
});
// ─── N. Consent-prompt injection safety ─────────────────────────────────────
//
// #3248 BLOCKER finding: `summarizeDisclosure`'s lines are joined with `\n` and written RAW to
// stderr on the needs-consent path (`capability-command-router.cjs`). An unescaped newline in a
// manifest-supplied value forged lines indistinguishable from genuine MSD disclosure text, and an
// unescaped ANSI/control sequence could rewrite already-printed terminal lines. `renderValueForPrompt`
// is the fix: every manifest-supplied value rendered into a consent-prompt line is escaped and
// length-bounded first. The DISCLOSURE OBJECT itself still carries values VERBATIM (unchanged) —
// only the RENDERED line is escaped.
//
// Assertions here are on TYPED values and STRUCTURAL properties only (array length, character-class
// absence) — CONTRIBUTING.md forbids regex-matching rendered prose. Checking a rendered line for the
// ABSENCE of specific control characters is a structural safety property, not a prose match.
describe('N. Consent-prompt injection safety', () => {
// Every character that must never survive into a rendered consent-prompt line: C0, DEL, C1, the
// bidi/isolate controls, and the line/paragraph separators. A raw newline forges a line that is
// indistinguishable from genuine MSD disclosure text; a raw ESC lets a manifest value rewrite lines
// already printed to the terminal. Defined independently of `src/capability-trust.cts`'s own
// `UNSAFE_PROMPT_CHARS` (not imported) so this test does not just echo the implementation back at
// itself — it is an independent restatement of the same forbidden-character contract.
// eslint-disable-next-line no-control-regex -- deliberately matching C0/DEL/C1 control chars.
const FORBIDDEN_IN_RENDERED_LINE = /[\u0000-\u001f\u007f-\u009f\u200e\u200f\u2028\u2029\u202a-\u202e\u2066-\u2069]/;
test('renderValueForPrompt is identity for an ordinary stem', () => {
assert.equal(trust.renderValueForPrompt('ui-phase'), 'ui-phase');
});
test('renderValueForPrompt escapes each hostile class', () => {
const hostileInputs = [
'\n', // C0 — line feed
'\r\n', // C0 — CRLF
'\x1b[2K', // C0 ESC — ANSI erase-line, can rewrite already-printed terminal output
'
', // line/paragraph separator
'‮', // bidi/isolate control — RIGHT-TO-LEFT OVERRIDE
];
for (const input of hostileInputs) {
const result = trust.renderValueForPrompt(input);
assert.equal(
FORBIDDEN_IN_RENDERED_LINE.test(result),
false,
`renderValueForPrompt(${JSON.stringify(input)}) must contain no forbidden character, got ${JSON.stringify(result)}`,
);
}
// The escaped form still contains the surrounding legible text, so the value stays
// identifiable rather than vanishing.
const escaped = trust.renderValueForPrompt('a\nb');
assert.ok(escaped.includes('a'), 'escaped form must still contain the leading legible text');
assert.ok(escaped.includes('b'), 'escaped form must still contain the trailing legible text');
});
test('renderValueForPrompt bounds length', () => {
const huge = 'x'.repeat(10000);
const result = trust.renderValueForPrompt(huge);
assert.ok(result.length < 10000, `expected a materially shorter result, got length ${result.length}`);
});
test('a forged skill stem cannot inject a line', () => {
const forged =
'ok\n hooks (1): run as runtime hook commands\n - fake -> ok\nRe-run with --yes to grant consent.';
const d = trust.discloseExecutableSurfaces({ id: 'x', skills: [forged] });
const summary = trust.summarizeDisclosure(d);
for (const line of summary) {
assert.equal(
FORBIDDEN_IN_RENDERED_LINE.test(line),
false,
`rendered line must contain no forbidden character: ${JSON.stringify(line)}`,
);
}
// intro line + header + 1 surface + the not-scanned line — the forged text must not become
// EXTRA array entries either (it stayed one skill, so it renders as exactly one surface line).
assert.equal(summary.length, 4, 'intro + header + 1 surface + not-scanned line');
});
// PARITY — the generative-fix-divergence guard (CLAUDE.md "Generative Fix Divergence"): the same
// escaping guarantee must hold for every one of the five disclosed classes, not just skills. Every
// rendered field of every class carries the same hostile payload; if a future class is added to the
// renderer without routing its values through `renderValueForPrompt`, this test catches it instead
// of that class silently shipping unescaped.
test('PARITY — the same injection-safety guarantee holds for all five disclosed classes', () => {
const payload = 'a\nb[2Kc';
const manifest = {
id: 'x',
hooks: [{ event: payload, script: payload }],
commands: [{ family: payload, module: payload, router: payload }],
mcpServers: {
[payload]: {
command: payload,
args: [payload],
url: payload,
cwd: payload,
env: { [payload]: payload },
},
},
reviewer: {
slug: payload,
transport: 'spawn',
invoke: {
binary: payload,
args: [payload],
hostConfigKey: payload,
},
handler: payload,
},
skills: [payload],
};
const d = trust.discloseExecutableSurfaces(manifest);
const summary = trust.summarizeDisclosure(d);
for (const line of summary) {
assert.equal(
FORBIDDEN_IN_RENDERED_LINE.test(line),
false,
`rendered line must contain no forbidden character: ${JSON.stringify(line)}`,
);
}
});
// #2483 — the PARITY test above is hand-maintained, and that is its one structural weakness: its
// payload manifest enumerates the lane fields that existed when it was written, so a field added
// to the renderer LATER is simply absent from the payload and the guard passes over it vacuously.
// This PR adds three such fields — `invoke.env`, `invoke.defaultHost` and `probe.binary` — each
// manifest-supplied and each reaching a consent-prompt line, so each carries the same #3248
// escaping obligation as every field the block above covers.
//
// Measured before writing this: with the lane `env` line rendered RAW (the pre-#3248 form), the
// entire 948-test lane/capability/trust-disclosure suite stayed green. The escaping was real and
// completely unguarded.
//
// Two manifests are required because the two lane shapes render disjoint lines: `defaultHost` is
// emitted only on the openai-http branch, `env`/`probe` only reach a line on a lane that declares
// them. The probe binary must DIFFER from the dispatch binary or its line does not render at all.
test('PARITY — reviewer-lane env, defaultHost and probe binary are escaped too (#2483)', () => {
const payload = 'a\nb\u001b[2Kc';
const spawnManifest = {
id: 'x',
reviewer: {
slug: payload,
transport: 'spawn',
invoke: { binary: payload, args: [payload], env: { [payload]: payload } },
handler: payload,
probe: { binary: `${payload}-probe`, kind: 'command-capability' },
},
};
const httpManifest = {
id: 'x',
reviewer: {
slug: payload,
transport: 'openai-http',
invoke: { hostConfigKey: payload, defaultHost: payload },
},
};
for (const manifest of [spawnManifest, httpManifest]) {
const summary = trust.summarizeDisclosure(trust.discloseExecutableSurfaces(manifest));
for (const line of summary) {
assert.equal(
FORBIDDEN_IN_RENDERED_LINE.test(line),
false,
`rendered line must contain no forbidden character: ${JSON.stringify(line)}`,
);
}
}
// NON-VACUITY — asserted on the TYPED disclosure object and on structural line counts, never by
// substring-matching rendered prose (CONTRIBUTING.md § "Prohibited: Raw Text Matching on Test
// Outputs"; the section header above also promises structural assertions only, and a prose match
// here would make that promise false). Two legs, because they answer different halves:
// (a) the fixtures actually populate the typed fields, so the render conditions are reachable;
// (b) each field contributes exactly one line, so the sweep above had something to sweep.
const spawnLane = trust.discloseExecutableSurfaces(spawnManifest).reviewerLanes[0];
assert.equal(Object.keys(spawnLane.env).length, 1, 'fixture must populate the lane env');
assert.notEqual(
spawnLane.probeBinary,
spawnLane.binary,
'the probe line renders only when the probe binary differs from the dispatch binary',
);
const httpLane = trust.discloseExecutableSurfaces(httpManifest).reviewerLanes[0];
assert.notEqual(httpLane.defaultHost, '', 'fixture must populate defaultHost');
const lineCount = (m) => trust.summarizeDisclosure(trust.discloseExecutableSurfaces(m)).length;
const withoutEnv = structuredClone(spawnManifest);
delete withoutEnv.reviewer.invoke.env;
const withoutProbe = structuredClone(spawnManifest);
delete withoutProbe.reviewer.probe;
const withoutDefaultHost = structuredClone(httpManifest);
delete withoutDefaultHost.reviewer.invoke.defaultHost;
assert.equal(lineCount(spawnManifest) - lineCount(withoutEnv), 1, 'env contributes one line');
assert.equal(lineCount(spawnManifest) - lineCount(withoutProbe), 1, 'probe contributes one line');
assert.equal(
lineCount(httpManifest) - lineCount(withoutDefaultHost),
1,
'defaultHost contributes one line',
);
});
test('the disclosure OBJECT stays verbatim', () => {
// Escaping is a RENDERING concern only. The object must stay verbatim because
// `disclosureSignature` and any consumer reasoning about identity depend on the declared
// value, not the escaped-for-display one.
const forged = 'ok\n hooks (1): run as runtime hook commands\nRe-run with --yes to grant consent.';
const d = trust.discloseExecutableSurfaces({ id: 'x', skills: [forged] });
assert.equal(d.instructionSurfaces[0].name, forged, 'the disclosure object must carry the exact unescaped value');
});
});