diff --git a/packages/codev/src/commands/consult/__tests__/issue-65-guessed-secondary.test.ts b/packages/codev/src/commands/consult/__tests__/issue-65-guessed-secondary.test.ts
new file mode 100644
index 000000000..b3cc274b2
--- /dev/null
+++ b/packages/codev/src/commands/consult/__tests__/issue-65-guessed-secondary.test.ts
@@ -0,0 +1,183 @@
+/**
+ * Issue #65 — a guessed secondary artifact burns the review round it is attached to.
+ *
+ * The original report was that `afx spawn` hands builders an unrelated old spec
+ * when the issue number collides with a zero-padded filename. That half is fixed
+ * (#69: the spawn-side lookup is exact-match only), and the uiv2 architect
+ * confirmed it by observation — `afx spawn 83` resolved
+ * `codev/specs/83-v2-client-shell.md` correctly with
+ * `0083-protocol-agnostic-spawn.md` sitting right beside it.
+ *
+ * What was still broken is narrower and was mis-attributed to spawn: the consult
+ * lane. `codev/plans/` held `0083-protocol-agnostic-spawn.md` and no `83-*`, so
+ * eleven consecutive `consult --type spec --issue 83` rounds each attached a
+ * stale January draft about a different subject as "the plan", and every
+ * reviewer spent part of its answer saying the plan looked unrelated.
+ *
+ * `artifactHeading` already warns on an inexact match, and that warning WORKED —
+ * the reviewers all flagged it. It just does not help. The round is spent either
+ * way.
+ *
+ * So the rule turns on who asked for the document. The PRIMARY artifact (the one
+ * named by `--type`) keeps the lenient fallback and its warning: you asked for it
+ * by id, refusing would block the review, and genuinely zero-padded legacy
+ * projects must still resolve. The SECONDARY one — the plan attached to a spec
+ * review, the spec attached to a plan review — is offered because it usually
+ * helps, and a guess usually does not. Omitting it costs nothing.
+ *
+ * Not a one-file collision: 82 project ids in this repo have only a zero-padded
+ * plan, so renumbering the colliding artifact would fix #83 and leave 81 others.
+ */
+
+import { describe, it, expect, vi, afterEach } from 'vitest';
+import * as fs from 'node:fs';
+import * as path from 'node:path';
+import { getResolver, matchesProjectIdExact } from '../../porch/artifacts.js';
+import { dropIfGuessed } from '../index.js';
+
+const REPO_ROOT = path.resolve(__dirname, '..', '..', '..', '..', '..', '..');
+
+afterEach(() => {
+  vi.restoreAllMocks();
+});
+
+describe('#65: the collision is real and is not one file', () => {
+  it('this repo still has both spellings sitting side by side', () => {
+    // If someone renumbers these, the test below stops proving anything, so say
+    // so here rather than letting it silently pass.
+    const specs = fs.readdirSync(path.join(REPO_ROOT, 'codev', 'specs'));
+
+    expect(specs).toContain('83-v2-client-shell.md');
+    expect(specs).toContain('0083-protocol-agnostic-spawn.md');
+  });
+
+  it('dozens of ids have ONLY a zero-padded plan, which is what makes this general', () => {
+    const plans = fs.readdirSync(path.join(REPO_ROOT, 'codev', 'plans'));
+    const padded = new Set<string>();
+    const unpadded = new Set<string>();
+    for (const f of plans) {
+      const p = /^0+(\d+)-/.exec(f);
+      if (p) padded.add(p[1]);
+      const u = /^([1-9]\d*)-/.exec(f);
+      if (u) unpadded.add(u[1]);
+    }
+    const onlyPadded = [...padded].filter(id => !unpadded.has(id));
+
+    expect(onlyPadded.length).toBeGreaterThan(50);
+  });
+});
+
+describe('#65: exactness is what separates the two cases', () => {
+  it('treats an unpadded name as project N', () => {
+    expect(matchesProjectIdExact('83-v2-client-shell', '83')).toBe(true);
+  });
+
+  it('does NOT treat a zero-padded name as project N', () => {
+    // The whole distinction. `0083-...` is a different document that collides on
+    // the number, not project 83 wearing leading zeros.
+    expect(matchesProjectIdExact('0083-protocol-agnostic-spawn', '83')).toBe(false);
+  });
+
+  it('still treats a zero-padded name as its own literal id', () => {
+    // A genuinely zero-padded legacy project asked for by its padded id resolves
+    // exactly, so the lenient fallback is not the only thing keeping it working.
+    expect(matchesProjectIdExact('0083-protocol-agnostic-spawn', '0083')).toBe(true);
+  });
+});
+
+describe('#65: the resolver still hands back the guess, which is why the caller must decide', () => {
+  it('returns a zero-stripped plan for an id with no exact plan', () => {
+    // Not a bug in the resolver: the lenient fallback exists so genuinely
+    // zero-padded legacy projects resolve. It is the CALLER that must not attach
+    // this to a review as if it were context.
+    const r = getResolver(REPO_ROOT);
+    const plans = fs.readdirSync(path.join(REPO_ROOT, 'codev', 'plans'));
+    const padded = plans.find(f => /^0+\d+-/.test(f));
+    const id = String(Number(/^0+(\d+)-/.exec(padded!)![1]));
+
+    const resolved = r.findPlanBaseName(id, '');
+
+    // Either it resolved exactly (someone added a canonical plan since) or it
+    // guessed — and if it guessed, the guess is the padded sibling.
+    if (resolved && !matchesProjectIdExact(resolved, id)) {
+      expect(resolved).toMatch(/^0+\d+-/);
+    }
+  });
+
+  it('resolves 83 exactly now that the canonical plan exists', () => {
+    // The project-83 run created codev/plans/83-v2-client-shell.md, so the
+    // reported symptom no longer reproduces on THIS id. That is why the fix is
+    // tested against the rule rather than against project 83.
+    const r = getResolver(REPO_ROOT);
+
+    expect(r.findPlanBaseName('83', '')).toBe('83-v2-client-shell');
+    expect(r.findSpecBaseName('83', '')).toBe('83-v2-client-shell');
+  });
+});
+
+describe('#65: dropIfGuessed — the rule itself', () => {
+  const ref = (label: string) => ({ content: '# doc', label, requestedId: '83' });
+
+  it('keeps an exactly-matched secondary artifact', () => {
+    const kept = dropIfGuessed(ref('83-v2-client-shell'), 'plan', '83');
+
+    expect(kept?.label).toBe('83-v2-client-shell');
+  });
+
+  it('drops the zero-stripped guess that cost eleven review rounds', () => {
+    const dropped = dropIfGuessed(ref('0083-protocol-agnostic-spawn'), 'plan', '83');
+
+    expect(dropped).toBeNull();
+  });
+
+  it('says on stderr why it dropped it, so the omission is not itself silent', () => {
+    // A missing plan with no explanation is the same defect facing the other
+    // way: the operator cannot tell "no plan exists" from "we declined one".
+    const lines: string[] = [];
+    vi.spyOn(console, 'error').mockImplementation((...a: unknown[]) => { lines.push(a.join(' ')); });
+
+    dropIfGuessed(ref('0083-protocol-agnostic-spawn'), 'plan', '83');
+
+    const said = lines.join('\n');
+    expect(said).toContain('0083-protocol-agnostic-spawn');
+    expect(said).toContain('zero-stripping');
+    expect(said).toContain('--plan-file');
+  });
+
+  it('passes null through — a genuinely absent artifact is not a dropped one', () => {
+    const lines: string[] = [];
+    vi.spyOn(console, 'error').mockImplementation((...a: unknown[]) => { lines.push(a.join(' ')); });
+
+    expect(dropIfGuessed(null, 'plan', '83')).toBeNull();
+    expect(lines).toEqual([]);
+  });
+
+  it('leaves a non-numeric label alone rather than guessing about it', () => {
+    // The bare-id fallback and prefix-style ids are not id-prefixed artifact
+    // names; exactness says nothing useful about them.
+    const kept = dropIfGuessed(ref('some-unnumbered-doc'), 'plan', '83');
+
+    expect(kept?.label).toBe('some-unnumbered-doc');
+  });
+
+  it('names the right kind in the message', () => {
+    const lines: string[] = [];
+    vi.spyOn(console, 'error').mockImplementation((...a: unknown[]) => { lines.push(a.join(' ')); });
+
+    dropIfGuessed(ref('0083-protocol-agnostic-spawn'), 'spec', '83');
+
+    expect(lines.join('\n')).toContain('--spec-file');
+  });
+
+  it('keeps a padded artifact when the padded id is what was asked for', () => {
+    // A genuinely zero-padded legacy project consulting on its own id must not
+    // lose its own plan to this rule.
+    const kept = dropIfGuessed(
+      { content: '# doc', label: '0083-protocol-agnostic-spawn', requestedId: '0083' },
+      'plan',
+      '0083',
+    );
+
+    expect(kept?.label).toBe('0083-protocol-agnostic-spawn');
+  });
+});
diff --git a/packages/codev/src/commands/consult/index.ts b/packages/codev/src/commands/consult/index.ts
index 5a7489dd4..84f2abcb4 100644
--- a/packages/codev/src/commands/consult/index.ts
+++ b/packages/codev/src/commands/consult/index.ts
@@ -328,6 +328,48 @@ function loadDotenv(workspaceRoot: string): void {
   }
 }
 
+/**
+ * Drop a SECONDARY artifact that was only guessed at (#65).
+ *
+ * A spec review attaches the plan for context, and a plan review attaches the
+ * spec. Nobody asked for that second document — it is offered because it usually
+ * helps. When the id resolves only through the zero-stripping fallback, it
+ * usually does not: `codev/plans/` held `0083-protocol-agnostic-spawn.md` and no
+ * `83-*`, so eleven consecutive `consult --type spec --issue 83` rounds each
+ * attached a stale January draft about a different subject, and every reviewer
+ * spent part of its answer saying the plan looked unrelated.
+ *
+ * `artifactHeading` already warns on an inexact match, and that warning WORKED —
+ * the reviewers all flagged it. It just does not help: the round is spent either
+ * way. For a document nobody requested, omitting a guess costs nothing and
+ * attaching one costs a review.
+ *
+ * The PRIMARY artifact keeps the lenient fallback plus its warning. There you
+ * asked for it by id, refusing would block the review outright, and a genuinely
+ * zero-padded legacy project must still resolve.
+ *
+ * 82 project ids in this repo have only a zero-padded plan, so this is not a
+ * one-file collision — renumbering the colliding artifact would fix #83 alone.
+ */
+export function dropIfGuessed(
+  ref: ContentRef | null,
+  kind: 'plan' | 'spec',
+  id: string,
+): ContentRef | null {
+  if (!ref) return null;
+  if (matchesProjectIdExact(ref.label, id)) return ref;
+  // Nothing numeric to compare means the label is not an id-prefixed artifact
+  // name (e.g. the bare id fallback); leave those alone.
+  if (!/^\d/.test(ref.label)) return ref;
+
+  console.error(
+    `Not attaching a ${kind} for context: '${ref.label}' matched ${id} only by zero-stripping, ` +
+    `so it is probably a different project's ${kind} that collides on the number (#65). ` +
+    `Pass --${kind}-file to attach one explicitly.`,
+  );
+  return null;
+}
+
 /**
  * Find spec content by project ID using the artifact resolver.
  * Returns a ContentRef with content and label, or null if not found.
@@ -2586,7 +2628,7 @@ function resolveBuilderQuery(workspaceRoot: string, type: string, options: Consu
     case 'spec': {
       const spec = findSpecContent(workspaceRoot, projectId);
       if (!spec) throw new Error(`Spec ${projectId} not found`);
-      const plan = findPlanContent(workspaceRoot, projectId);
+      const plan = dropIfGuessed(findPlanContent(workspaceRoot, projectId), 'plan', projectId);
       console.error(`Spec: ${spec.label}`);
       if (plan) console.error(`Plan: ${plan.label}`);
       return buildSpecQuery(spec, plan);
@@ -2595,15 +2637,15 @@ function resolveBuilderQuery(workspaceRoot: string, type: string, options: Consu
     case 'plan': {
       const plan = findPlanContent(workspaceRoot, projectId);
       if (!plan) throw new Error(`Plan ${projectId} not found`);
-      const spec = findSpecContent(workspaceRoot, projectId);
+      const spec = dropIfGuessed(findSpecContent(workspaceRoot, projectId), 'spec', projectId);
       console.error(`Plan: ${plan.label}`);
       if (spec) console.error(`Spec: ${spec.label}`);
       return buildPlanQuery(plan, spec);
     }
 
     case 'impl': {
-      const spec = findSpecContent(workspaceRoot, projectId);
-      const plan = findPlanContent(workspaceRoot, projectId);
+      const spec = dropIfGuessed(findSpecContent(workspaceRoot, projectId), 'spec', projectId);
+      const plan = dropIfGuessed(findPlanContent(workspaceRoot, projectId), 'plan', projectId);
       console.error(`Project: ${projectId}`);
       if (spec) console.error(`Spec: ${spec.label}`);
       if (plan) console.error(`Plan: ${plan.label}`);
@@ -2622,8 +2664,8 @@ function resolveBuilderQuery(workspaceRoot: string, type: string, options: Consu
       if (!currentPhase) {
         throw new Error('No current plan phase detected. Use --plan-phase to specify.');
       }
-      const spec = findSpecContent(workspaceRoot, projectId);
-      const plan = findPlanContent(workspaceRoot, projectId);
+      const spec = dropIfGuessed(findSpecContent(workspaceRoot, projectId), 'spec', projectId);
+      const plan = dropIfGuessed(findPlanContent(workspaceRoot, projectId), 'plan', projectId);
       console.error(`Phase: ${currentPhase}`);
       if (spec) console.error(`Spec: ${spec.label}`);
       if (plan) console.error(`Plan: ${plan.label}`);
@@ -2713,7 +2755,7 @@ function resolveArchitectQuery(workspaceRoot: string, type: string, options: Con
       const { resolver, sourceLabel } = resolveArtifactSource(workspaceRoot, issueId, options.branch);
       const spec = findSpecContent(workspaceRoot, issueId, resolver);
       if (!spec) throw new Error(`Spec ${issueId} not found at ${sourceLabel}`);
-      const plan = findPlanContent(workspaceRoot, issueId, resolver);
+      const plan = dropIfGuessed(findPlanContent(workspaceRoot, issueId, resolver), 'plan', issueId);
       console.error(`Source: ${sourceLabel}`);
       console.error(`Spec: ${spec.label}`);
       if (plan) console.error(`Plan: ${plan.label}`);
@@ -2724,7 +2766,7 @@ function resolveArchitectQuery(workspaceRoot: string, type: string, options: Con
       const { resolver, sourceLabel } = resolveArtifactSource(workspaceRoot, issueId, options.branch);
       const plan = findPlanContent(workspaceRoot, issueId, resolver);
       if (!plan) throw new Error(`Plan ${issueId} not found at ${sourceLabel}`);
-      const spec = findSpecContent(workspaceRoot, issueId, resolver);
+      const spec = dropIfGuessed(findSpecContent(workspaceRoot, issueId, resolver), 'spec', issueId);
       console.error(`Source: ${sourceLabel}`);
       console.error(`Plan: ${plan.label}`);
       if (spec) console.error(`Spec: ${spec.label}`);
@@ -2794,8 +2836,8 @@ function resolveArchitectQuery(workspaceRoot: string, type: string, options: Con
       // change diff scope, only artifact source — cmap-3 finding).
       const ref = options.branch ?? `origin/${pr.headRefName}`;
       const resolver = new GitRefResolver(workspaceRoot, ref);
-      const spec = findSpecContent(workspaceRoot, issueId, resolver);
-      const plan = findPlanContent(workspaceRoot, issueId, resolver);
+      const spec = dropIfGuessed(findSpecContent(workspaceRoot, issueId, resolver), 'spec', issueId);
+      const plan = dropIfGuessed(findPlanContent(workspaceRoot, issueId, resolver), 'plan', issueId);
       console.error(`Project: ${issueId} (PR #${pr.number}, ${pr.headRefName} → ${pr.baseRefName})`);
       console.error(`Source: ${ref}`);
       if (spec) console.error(`Spec: ${spec.label}`);