Implements Spor C of post-v3.4.0 roadmap. Zero-dep harness measures
CLAUDE_CODE_FORK_SUBAGENT cache-prefix preservation across 3 fork-children
with identical --allowedTools at 150-250K parent context.
Harness uses --append-system-prompt-file (avoids stdin buffer cap at
>200K bytes) + --exclude-dynamic-system-prompt-sections (prevents
per-child cache-prefix divergence from cwd/env/git-status).
Companion analyser summarizes accumulated ultraexecute-stats.jsonl:
percentile wall_time (p50/p90/max), total events, ISO time range.
Output: JSON via --json <path> CLI shim.
Result file is gitignored (*.local.md). Master-plan thresholds
(<= 1.5K positive / >= 3.5K negative) gate the v3.5.0 Path C decision.
Brief: .claude/projects/2026-05-04-spor-c-q3-cache-prefix-experiment/brief.md
Master-plan: .claude/projects/2026-05-04-post-v3.4.0-roadmap/master-plan.md
Step 9 of v3.4.1 plan.
lib/util/cleanup.mjs (new):
- cleanupProject(projectDir, {dryRun, confirm}) reads
.session-state.local.json via validateSessionState; refuses unless the
parsed status is strictly equal to 'completed' (per risk-assessor
Critical 2 — no soft-match on similar statuses).
- Default dryRun: true; refuses dryRun: false without explicit
confirm: true (CLEANUP_REQUIRES_CONFIRM).
- Removes .session-state.local.json + NEXT-SESSION-PROMPT.local.md
candidates; ENOENT counts as "already absent" so the function is
idempotent.
- No CLI shim — invoked from /ultracontinue --cleanup via inline ESM
(Step 10 wires this in).
tests/lib/cleanup.test.mjs (new):
- 7 cases: dry-run lists candidates without deleting; confirm-mode
deletes both files; idempotent re-run signals CLEANUP_NO_STATE_FILE
after fully cleaned; refuses on status: in_progress
(CLEANUP_NOT_COMPLETED); refuses dryRun: false without confirm
(CLEANUP_REQUIRES_CONFIRM); defaults to dry-run; missing state file
returns CLEANUP_NO_STATE_FILE.
Internal scaffolding consumed by Step 10 (Phase 0.5 wire-up). User-facing
docs land with Step 14.
Tests 348 -> 355 (+7).
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Step 8 of v3.4.1 plan.
commands/ultracontinue-local.md:
- New Phase 1.5 between Phase 1 and Phase 2 — runs the
next-session-prompt-validator in --consistency mode when both candidates
exist (plugin-root + project-dir). Refuses on producer mismatch with
fresh candidates, downgrades stale candidate to a warning, downgrades
>24h wall-clock drift to a soft warning.
- Anti-substitution rule applies — paths emitted as concrete tokens, not
template placeholders.
lib/validators/next-session-prompt-validator.mjs:
- Sharpen NEXT_SESSION_PROMPT_PRODUCER_MISMATCH error message to include
the literal "produced_by" field name so consumers (and operators) can
trace the disagreement back to the YAML key.
tests/commands/ultracontinue.test.mjs:
- Test (Bug 3 prose) — Phase 1.5 header present, references validator,
appears between Phase 1 and Phase 2 in document order.
- Test (Bug 3 e) — tmp project dir with state file + two prompt files
with mismatched producers, both fresh relative to state.updated_at;
CLI consistency mode exits non-zero, JSON stdout surfaces
NEXT_SESSION_PROMPT_PRODUCER_MISMATCH with both paths and the
"produced_by" token in the message.
Tests 346 -> 348 (+2).
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Step 6 of v3.4.1 plan. Adds the validator quartet
(Content/Object/Consistency/CLI) for NEXT-SESSION-PROMPT.local.md
frontmatter (produced_by, produced_at). State-anchored staleness check
is the primary refusal; 24h wall-clock drift downgraded to soft warning
to avoid false positives on weekend pauses.
Internal scaffolding consumed by Step 8 (Phase 1.5 wire-up). User-facing
docs land with Step 14 (CHANGELOG + README + version bump).
Tests 335 -> 346 (+11): 9 unit + 2 CLI shim cases.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Step 1 of v3.4.1 hot-fix plan (project 2026-05-04-v3.3.1-ultracontinue-fixes).
Adds ultracontinue entry to FLAG_SCHEMA covering boolean flags --help,
--cleanup, --confirm, --dry-run with no valued flags. The -h short form
is intentionally not aliased: it appears as positional[0] === '-h' and
the command prose dispatches usage on either condition.
7 new tests in tests/lib/arg-parser.test.mjs verify empty args, --help,
-h positional, --cleanup, --cleanup --confirm, project-dir positional,
and .md positional (parser-level accept; command-level reject).
Three changes in one commit:
1. NEW lib/util/atomic-write.mjs — exports atomicWriteJson(path, obj),
the canonical tmp+rename pattern. Reused by pre-compact-flush.mjs and
(in subsequent steps) by the new session-state writer.
2. NEW tests/lib/atomic-write.test.mjs — 4 unit tests covering
round-trip, no-orphan-tmp, overwrite-atomic, pretty-print formatting.
3. REFACTOR hooks/scripts/pre-compact-flush.mjs — replace the inline
atomicWrite() with the imported atomicWriteJson(). Also fixes a
pre-existing syntax error (leading whitespace + stray --resume token
outside the comment block) that silently broke the hook from v3.1.0
onward — PreCompact runtime is fail-open and swallowed the error.
File reformatted with standard zero-indent JS.
163 → 167 tests, 0 fail.
Step 2 of /ultracontinue v3.3.0 (project 2026-05-01-ultracontinue).
Step 1 of v2.0 plan. Hard cut from commands/ to skills/ per Anthropic
recommendation for new plugins. Frontmatter sets disable-model-invocation:
true and pins model: claude-sonnet-4-6. Docs (README, CLAUDE.md, root
README) deferred to Step 9 per plan.
