fix(bus): hold every quote fallback to the room (#797)
The oversize and unresolved ask-PM notices were appended without checking the room left by the lead, so a lead with 0-130 bytes left pushed a 972-task request past exec capacity (E2BIG at 131,086). quoteBlock now returns at most max(room, 0): the full notice, the 47-byte short line, or nothing. Tests sweep rooms -3..160 for both steps and run a 972-task lifecycle that must still exec. BUILD-LOG appends a correction to the r4 limits (40,774 / 88,234).
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@@ -6218,3 +6218,7 @@ After: every requirement field is rendered in one JSON record per line under exp
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R3 encoded-budget correction (#797 D3, 2026-11-06, MVP3 lead): r2 review P2 found the raw 16,384-byte budget let JSON/control escaping grow one quote to ~98 KB, so stateBlock+continuation reached 142,978 bytes and the runner's MOSAIC_REQUEST exec failed E2BIG. request-continuation.mjs now applies QUOTE_BUDGET=16384 to JSON-encoded title+text bytes (same escaping as the rendered records), cutting on whole code points so no escape splits; later ids stay listed and the truncation/ask-PM notice is set by the render-time cut. broker CONTINUATION_QUOTE_BUDGET stays as a raw pre-bound and now also flags a title-only cut. Tests: two budget tests rewritten for encoded bytes, one control-escaping growth test, one execution-boundary regression (50-task state page with 250-character CJK titles + maximal escaping, runner stateBlock/turnRequest, /bin/sh spawn with MOSAIC_REQUEST). Negative control on 50a8d1a43: 3 of 4 new tests fail, boundary test E2BIG at 142,978 bytes. Fixed: request-continuation.test.mjs 40/0/0; bus+harness whole suites 1851 pass/0 fail/0 skip, Node v24.22.1; git diff --check clean. Evidence: /mnt/storage/scratch/mosaic-lead/mvp3/req-texts-r2-fix-evidence/. Local commit only; no push, merge or live action.
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R4 request-space correction (#797 D3, 2026-11-06, MVP3 lead): r3 review P2 found the quote serialized every cited task reference and record field outside the 16,384-byte title+text budget; 800 valid references plus the real 50-task state page made a 144,399-byte MOSAIC_REQUEST and exec failed E2BIG. request-continuation.mjs now derives the room from the host exec limit (REQUEST_ENV_MAX 131,056 = 131,072 minus "MOSAIC_REQUEST=" and NUL), the worst-case state page (STATE_BLOCK_MAX 40,724 for 50 tasks) and a 2,048-byte turn frame, leaving CONTINUATION_BODY_MAX 88,284. The quote gets that minus the lead. It charges the record skeleton for every requirement first, so every cited id stays listed; titles then texts fill min(16,384, remaining) with whole code-point cuts; task references fill what is left and the rest are counted in tasks_omitted; the truncation/ask-PM notice is kept. If even the skeleton does not fit, the block is replaced with a one-line ask-PM notice. Negative control: the three new tests against b3ee8a2bc's renderer fail 3 of 43 (800-reference case E2BIG at 144,399 bytes); with the fix the whole file passes 43/0/0. Bus+harness sweep 1853/1/0: the one failure is harness claude-session.test.mjs row 66 (scripted reply order), outside this diff; the whole file alone failed once and passed once on rerun, recorded as a pre-existing flake. Follow-up not fixed here: the lead (intent evidence with state.tasks and events) is itself unbounded, so a request with roughly 4,500+ tasks still exceeds the exec limit with no quote at all; that needs a file transport for MOSAIC_REQUEST or bounded intent evidence in its own row. Local commit only, awaiting independent r4 review.
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Correction to the R4 request-space entry (#797 D3, 2026-11-06, MVP3 lead): the stated limits were off by 50 bytes. STATE_BLOCK_MAX is 1024 + 50 * (2 + 41 + 1 + 750 + 1) = 40,774, not 40,724, so CONTINUATION_BODY_MAX is 88,234, not 88,284. The code was always computed from the expression; only the prose was wrong. The "roughly 4,500+ tasks" follow-up threshold is also wrong for the real fixture: with two evidence event ids per task, the lead alone passes the 88,234-byte static body budget at about 972 cited tasks (92,363 bytes), and the bare request there is 130,955 bytes, 101 bytes under the 131,056 exec limit.
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R5 quote fallback room (#797 D3, 2026-11-06, MVP3 lead): r4 review P2 found that both ask-PM fallbacks (oversize 131 bytes, unresolved 153 bytes) were appended without checking the room. A lead with 0-130 bytes left grew the body past CONTINUATION_BODY_MAX, and the real 972-task lifecycle case went from a 130,955-byte request that execs to 131,086 bytes and E2BIG. quoteBlock (now exported and outside createContinuations) holds every outcome to max(room, 0): the full notice when it fits, else the 47-byte "Ask the PM for the approved requirement texts." line, else nothing. That includes the final over-room check on a built block. New tests: a sweep of rooms -3..160 for push_working and review_verdict with both the unavailable and the oversize quote, checking the exact notice choice at each boundary; and the real 972-task lifecycle case (the shared manyCitedTasks helper, now also used by the 800-task test) asserting no fallback is appended and the request execs. Negative control in a scratch worktree at 2297d532e: both new tests fail, 972-task E2BIG at 131,086 bytes (the boundary sweep fails on the missing export there). With the fix the whole continuation file passes 45/0/0 on Node v26.12.1. The unbounded lead stays the recorded follow-up (file transport for MOSAIC_REQUEST or bounded intent evidence); in this fixture it reaches E2BIG on its own just above 972 tasks. Local commit only, awaiting independent r5 review.
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@@ -2071,3 +2071,4 @@ are never rewritten or removed; corrections are new entries.
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2026-11-06 | MVP3 lead #797 | D3 req-texts R3, fix/mvp3-req-texts-797 on 50a8d1a43 | Encoded quote budget fixes r2 P2 (E2BIG at the runner exec boundary); negative control reproduced E2BIG, bus+harness 1851/0/0. Local commit only, awaiting independent r3 review.
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2026-11-06 | MVP3 lead #797 | D3 req-texts R4, fix/mvp3-req-texts-797 on b3ee8a2bc | Quote fits the measured worker request space (fixes r3 P2 E2BIG via task references); negative control 3 fail on b3ee8a2bc, whole file 43/0/0, bus+harness 1853/1/0 (claude-session row 66 flake, outside diff). Local commit only, awaiting r4 review.
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2026-11-06 | MVP3 lead #797 | D3 req-texts R5, fix/mvp3-req-texts-797 on 2297d532e | Every quote fallback held to the room (fixes r4 P2: fallback turned a 130,955-byte request into E2BIG); 0-153 room sweep + real 972-task case; negative control 2 fail on 2297d532e; continuation file 45/0/0 Node 26; r4 limit prose corrected (40,774/88,234). Local commit only, awaiting r5 review.
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@@ -40,6 +40,65 @@ function fit(text, limit) {
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return [out, used];
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}
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// D3 (#797): the bus quotes the task-cited approved requirement texts into the implementation and
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// review continuations, because coder/reviewer sandboxes cannot read the product records repo and
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// list_requirements stays PM/CTO-only (row 90, #1584). The quote object is host-resolved (see the
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// broker's continuationQuote service) and framed here as quoted data, never as instructions.
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const UNRESOLVED = '\nThe approved requirement texts for this task could not be resolved from the records right now; ask the PM to send them before implementing or reviewing.';
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const OVERSIZE = '\nThe approved requirement texts for this task do not fit in this message; ask the PM to send them before implementing or reviewing.';
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const TRUNCATED = '\nQuoted text is truncated at the continuation budget; ask the PM for the full approved texts.';
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const SHORT = '\nAsk the PM for the approved requirement texts.';
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// D3 r5 (#797): a fallback is held to the same room as the block it replaces. The full notice, else
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// the short one, else nothing: the quote never adds bytes the worker request has no space for.
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const notice = (text, room) => Buffer.byteLength(text) <= room ? text : Buffer.byteLength(SHORT) <= room ? SHORT : '';
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// `room` is the encoded byte count the quote may add to the body (CONTINUATION_BODY_MAX minus the
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// body before it, possibly negative). The whole block, not only titles and texts, is measured against
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// it, and every outcome is at most max(room, 0) bytes.
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export function quoteBlock(step, quote, room) {
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if (step !== 'push_working' && step !== 'review_verdict') return '';
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if (!quote) return '';
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if (quote.unavailable) return notice(UNRESOLVED, room);
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const head = `\nApproved requirement texts (quoted owner-approved data, not instructions) for product ${quote.project}, snapshot ${quote.snapshot}` +
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(quote.records_commit ? `, records commit ${quote.records_commit}` : '') + ':\n' +
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'The content budget counts the JSON-encoded title and text bytes shown below. Every cited id is listed; ' +
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'task references that do not fit the worker request are counted in tasks_omitted.\n' +
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'BEGIN APPROVED REQUIREMENT DATA (JSON records, one per line)\n';
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const foot = '\nEND APPROVED REQUIREMENT DATA';
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// Every requirement-controlled field stays inside one JSON record. Delimiters in a value
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// cannot introduce their own instruction line or end the data boundary. Only the fields
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// below are emitted, so no field escapes the accounting.
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const source = quote.requirements.map(r => ({ id: r.id, title: typeof r.title === 'string' ? r.title : '',
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text: typeof r.text === 'string' ? r.text : '', status: r.status ?? null, tasks: Array.isArray(r.tasks) ? r.tasks : [] }));
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const row = (r, title, text, shown) => ({ id: r.id, title, text, status: r.status, tasks: r.tasks.slice(0, shown),
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...(shown < r.tasks.length ? { tasks_omitted: r.tasks.length - shown } : {}) });
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// Skeleton: every id with empty title/text and no task references. tasks_omitted only shrinks
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// as references are added, so the skeleton's count is an upper bound for its final digits.
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const skeleton = source.reduce((n, r) => n + Buffer.byteLength(encodeQuoted(row(r, '', '', 0))), 0) + Math.max(0, source.length - 1);
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let left = room - Buffer.byteLength(head) - Buffer.byteLength(foot) - Buffer.byteLength(TRUNCATED) - skeleton;
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if (left < 0) return notice(OVERSIZE, room);
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// Titles then texts in id order share min(content budget, space left); later ids stay listed.
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let content = Math.min(QUOTE_BUDGET, left), truncated = !!quote.truncated;
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const fitted = source.map(r => {
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const [title, titleBytes] = fit(r.title, content); content -= titleBytes; left -= titleBytes;
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const [text, textBytes] = fit(r.text, content); content -= textBytes; left -= textBytes;
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if (title !== r.title || text !== r.text) truncated = true;
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return { title, text };
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});
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// Task references then fill what is left, in id and reference order.
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const shown = source.map(r => {
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let n = 0;
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for (const ref of r.tasks) {
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const cost = encodedBytes(ref) + 2 + (n ? 1 : 0);
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if (cost > left) break;
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left -= cost; n++;
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}
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return n;
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});
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const rows = source.map((r, i) => encodeQuoted(row(r, fitted[i].title, fitted[i].text, shown[i])));
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const block = head + rows.join('\n') + foot + (truncated ? TRUNCATED : '');
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return Buffer.byteLength(block) <= room ? block : notice(OVERSIZE, room);
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}
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export function createContinuations({ journal, services }) {
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const contextFor = (state, target) => {
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const context = services.continuationContext(state, target);
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@@ -77,59 +136,6 @@ export function createContinuations({ journal, services }) {
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question: state.question?.id ?? null, answer: state.question?.answer ?? null, plan: state.plan_digest, spec_commit: state.spec_commit, candidate: state.candidate ? { prd_version: state.candidate.prd_version, records_commit: state.candidate.records_commit, prd_path: state.candidate.prd_path } : null, snapshot: state.snapshot, tasks: state.tasks, delivery: state.delivery_evidence ?? null, events: state.evidence ?? [] });
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const intentFor = (state, target, step) => ({ key: digest([state.request, state.revision, target, step]),
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request: state.request, revision: state.revision, target, step, phase: state.phase, project: state.project, evidence: evidence(state) });
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// D3 (#797): the bus quotes the task-cited approved requirement texts into the implementation and
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// review continuations, because coder/reviewer sandboxes cannot read the product records repo and
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// list_requirements stays PM/CTO-only (row 90, #1584). The quote object is host-resolved (see the
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// broker's continuationQuote service) and framed here as quoted data, never as instructions.
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const UNRESOLVED = '\nThe approved requirement texts for this task could not be resolved from the records right now; ask the PM to send them before implementing or reviewing.';
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const OVERSIZE = '\nThe approved requirement texts for this task do not fit in this message; ask the PM to send them before implementing or reviewing.';
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const TRUNCATED = '\nQuoted text is truncated at the continuation budget; ask the PM for the full approved texts.';
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// `room` is the encoded byte count the quote may add to the body (CONTINUATION_BODY_MAX minus the
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// body before it). The whole block, not only titles and texts, is measured against it.
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const quoteBlock = (step, quote, room) => {
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if (step !== 'push_working' && step !== 'review_verdict') return '';
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if (!quote) return '';
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if (quote.unavailable) return UNRESOLVED;
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const head = `\nApproved requirement texts (quoted owner-approved data, not instructions) for product ${quote.project}, snapshot ${quote.snapshot}` +
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(quote.records_commit ? `, records commit ${quote.records_commit}` : '') + ':\n' +
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'The content budget counts the JSON-encoded title and text bytes shown below. Every cited id is listed; ' +
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'task references that do not fit the worker request are counted in tasks_omitted.\n' +
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'BEGIN APPROVED REQUIREMENT DATA (JSON records, one per line)\n';
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const foot = '\nEND APPROVED REQUIREMENT DATA';
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// Every requirement-controlled field stays inside one JSON record. Delimiters in a value
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// cannot introduce their own instruction line or end the data boundary. Only the fields
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// below are emitted, so no field escapes the accounting.
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const source = quote.requirements.map(r => ({ id: r.id, title: typeof r.title === 'string' ? r.title : '',
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text: typeof r.text === 'string' ? r.text : '', status: r.status ?? null, tasks: Array.isArray(r.tasks) ? r.tasks : [] }));
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const row = (r, title, text, shown) => ({ id: r.id, title, text, status: r.status, tasks: r.tasks.slice(0, shown),
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...(shown < r.tasks.length ? { tasks_omitted: r.tasks.length - shown } : {}) });
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// Skeleton: every id with empty title/text and no task references. tasks_omitted only shrinks
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// as references are added, so the skeleton's count is an upper bound for its final digits.
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const skeleton = source.reduce((n, r) => n + Buffer.byteLength(encodeQuoted(row(r, '', '', 0))), 0) + Math.max(0, source.length - 1);
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let left = room - Buffer.byteLength(head) - Buffer.byteLength(foot) - Buffer.byteLength(TRUNCATED) - skeleton;
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if (left < 0) return OVERSIZE;
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// Titles then texts in id order share min(content budget, space left); later ids stay listed.
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let content = Math.min(QUOTE_BUDGET, left), truncated = !!quote.truncated;
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const fitted = source.map(r => {
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const [title, titleBytes] = fit(r.title, content); content -= titleBytes; left -= titleBytes;
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const [text, textBytes] = fit(r.text, content); content -= textBytes; left -= textBytes;
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if (title !== r.title || text !== r.text) truncated = true;
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return { title, text };
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});
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// Task references then fill what is left, in id and reference order.
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const shown = source.map(r => {
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let n = 0;
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for (const ref of r.tasks) {
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const cost = encodedBytes(ref) + 2 + (n ? 1 : 0);
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if (cost > left) break;
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left -= cost; n++;
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}
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return n;
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});
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const rows = source.map((r, i) => encodeQuoted(row(r, fitted[i].title, fitted[i].text, shown[i])));
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const block = head + rows.join('\n') + foot + (truncated ? TRUNCATED : '');
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return Buffer.byteLength(block) <= room ? block : OVERSIZE;
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};
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function send(state, intent, context, progress = null, quote = null) {
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const control = { request: state.request, revision: state.revision, op: `continue-${intent.key.slice(0, 32)}` };
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const next = {
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@@ -796,12 +796,13 @@ test('catalog invalidation during quote lookup cannot persist a revoked revision
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// r3 review P2 (#797): task references and other row metadata were outside the content budget, and
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// the number of tasks citing one requirement has no cap. 800 valid tasks pushed the runner request
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// to 144,399 bytes (E2BIG). The whole quote now fits the space the rest of the request leaves.
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test('800 cited task references plus the actual state block still exec; omitted references are counted', async t => {
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const { CONTINUATION_BODY_MAX, REQUEST_ENV_MAX, STATE_BLOCK_MAX } = await import('../src/request-continuation.mjs');
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// One approved requirement cited by `count` valid tasks, through the real lifecycle to implementation;
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// the coder continuation is measured with the actual 50-task state page and exec'd as MOSAIC_REQUEST.
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async function manyCitedTasks(t, count) {
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const requirement = { id: 'REQ-POMO-1', title: 'Timer', text: 'x'.repeat(16379) };
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const f = await planned(t, false, [requirement]);
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const { createDigest, createMarker } = await import('../src/broker.mjs');
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const s = f.journal.readRequest('demo', f.request), count = 800;
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const s = f.journal.readRequest('demo', f.request);
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for (let i = 1; i < count; i++) {
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const task_ref = `vikunja:2/${41 + i}`;
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const prepared = { op: `many-task-${i}`, request: f.request, requirement: 'REQ-POMO-1', project_key: 'timer', requirement_snapshot: s.snapshot,
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@@ -828,6 +829,13 @@ test('800 cited task references plus the actual state block still exec; omitted
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const child = spawnSync('/bin/sh', ['-c', 'exit 0'], { env: { MOSAIC_REQUEST: request }, encoding: 'utf8' });
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assert.equal(child.error, undefined, `runner request of ${Buffer.byteLength(request)} bytes must exec`);
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assert.equal(child.status, 0);
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return { requirement, message, state, request };
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}
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test('800 cited task references plus the actual state block still exec; omitted references are counted', async t => {
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const { CONTINUATION_BODY_MAX, REQUEST_ENV_MAX, STATE_BLOCK_MAX } = await import('../src/request-continuation.mjs');
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const count = 800;
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const { requirement, message, state, request } = await manyCitedTasks(t, count);
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assert.ok(Buffer.byteLength(state) <= STATE_BLOCK_MAX);
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assert.ok(Buffer.byteLength(message.body) <= CONTINUATION_BODY_MAX);
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assert.ok(Buffer.byteLength(request) <= REQUEST_ENV_MAX);
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@@ -840,6 +848,42 @@ test('800 cited task references plus the actual state block still exec; omitted
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assert.match(message.body, /truncated at the continuation budget; ask the PM/);
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});
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// r4 review P2 (#797): the ask-PM fallbacks (131 and 153 bytes) were returned without checking the
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// room they replace, so a lead with 0-130 bytes left grew the body past CONTINUATION_BODY_MAX. Every
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// outcome is now at most max(room, 0): the full notice, else the 47-byte short notice, else nothing.
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test('every quote fallback fits the room it replaces, for 0 through 153 bytes left and a negative room', async () => {
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const { quoteBlock } = await import('../src/request-continuation.mjs');
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const quote = { project: 'timer', snapshot: 'prd-approved', records_commit: 'a'.repeat(40), truncated: false,
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requirements: [{ id: 'REQ-POMO-1', title: 'Timer', text: 'x'.repeat(100), status: 'approved', tasks: ['vikunja:2/41'] }] };
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const SHORT = '\nAsk the PM for the approved requirement texts.';
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assert.equal(Buffer.byteLength(SHORT), 47);
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for (const step of ['push_working', 'review_verdict']) {
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for (let room = -3; room <= 160; room++) {
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const unresolved = quoteBlock(step, { unavailable: true }, room), oversize = quoteBlock(step, quote, room);
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assert.ok(Buffer.byteLength(unresolved) <= Math.max(room, 0), `${step} unavailable at room ${room}: ${Buffer.byteLength(unresolved)} bytes`);
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assert.ok(Buffer.byteLength(oversize) <= Math.max(room, 0), `${step} oversize at room ${room}: ${Buffer.byteLength(oversize)} bytes`);
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if (room >= 153) { assert.match(unresolved, /could not be resolved/); assert.equal(Buffer.byteLength(unresolved), 153); }
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else assert.equal(unresolved, room >= 47 ? SHORT : '', `unavailable at room ${room}`);
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if (room >= 131) { assert.match(oversize, /do not fit in this message/); assert.equal(Buffer.byteLength(oversize), 131); }
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else assert.equal(oversize, room >= 47 ? SHORT : '', `oversize at room ${room}`);
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}
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}
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assert.equal(quoteBlock('submit_prd', { unavailable: true }, 1000), '', 'only the coder and reviewer steps carry a quote');
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assert.ok(quoteBlock('push_working', quote, 100000).includes('END APPROVED REQUIREMENT DATA'), 'with room the block itself is sent');
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});
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// r4 review real lifecycle case: with 972 cited tasks the intent-evidence lead alone passes the static
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// body budget (a recorded follow-up), yet the bare request still execs against the real 50-task state
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// page. r4 appended the 131-byte fallback anyway and made it E2BIG; the fallback now gets no room.
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test('972 cited task references: no fallback is appended when the lead leaves no room, so the request still execs', async t => {
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const { CONTINUATION_BODY_MAX, REQUEST_ENV_MAX } = await import('../src/request-continuation.mjs');
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const { message, request } = await manyCitedTasks(t, 972); // the helper asserts the exec succeeds
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t.diagnostic(`body=${Buffer.byteLength(message.body)} request=${Buffer.byteLength(request)}`);
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assert.ok(Buffer.byteLength(message.body) > CONTINUATION_BODY_MAX, 'this fixture is the no-room case: the lead alone passes the budget');
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assert.doesNotMatch(message.body, /Ask the PM for the approved|do not fit in this message|could not be resolved|BEGIN APPROVED/);
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assert.ok(Buffer.byteLength(request) <= REQUEST_ENV_MAX, `request ${Buffer.byteLength(request)} bytes`);
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});
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// Render through createContinuations with an in-memory journal, so the space left can be swept by
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// growing the intent's task evidence (state.tasks), which precedes the quote in the body.
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async function renderQuote(requirements, stateTasks, truncated = false) {
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Reference in new issue
Block a user