Run ID: 2026-04-24T08-50-22_magellan-seo-toolkit-rerun
Plugin: magellan-seo-toolkit v1.0.0 (same plugin as Pilot 4 orig)
Purpose: Validate that the 6 new amendments + 2 reinforcements shipped in commit 925e2ef (proposed by /escape-analysis) close the 6 misses observed in original Pilot 4.
Driver: Chrome DevTools MCP with --experimental-page-id-routing
Dispatch: Concurrent Tester wave (6 charters, Sonnet-default)
Wallclock: 59m 22s (includes one killed wave + retry — see "Operational learning")
Recall 10/10 (up from 4/10 in Pilot 4 orig). +6 issues recovered, 0 regressions. All 6 new amendments fired, both reinforcements fired. Escape-analysis loop now validated on three plugins, three perfect reruns.
| Pilot | Model | Original | Amendments shipped | Rerun |
|---|---|---|---|---|
| Pilot 2 (contact-forms) | Opus | 7/10 | 4 (visual / a11y / charset / sibling-propagation) | 10/10 |
| Pilot 3 (members) | Opus | 5/10 | 5 (empty-state / absence / plugin-native / cross-feature / UI-path) | 10/10 |
| Pilot 4 (seo-toolkit) | Sonnet | 4/10 | 6 + 2 reinforcements (counters / state-variety / enumerate / unsaved-work / two-tab / view-source) | 10/10 |
10/10 planted + 17 bonus findings. 27 Problems, 4 Questions, 9 Improvements, 10 Praises.
| Charter | Problems | Questions | Improvements | Praises | Planted caught |
|---|---|---|---|---|---|
| robots-txt-deadui | 2 | 0 | 0 | 1 | 1/1 (#6) |
| breadcrumbs-jsonld | 3 | 0 | 0 | 1 | 1/1 (#8) |
| meta-box-and-title-override | 7 | 1 | 3 | 2 | 2/2 (#9, #10) |
| redirects-manager | 6 | 1 | 3 | 2 | 2/2 (#5, #7) + #4 as Question |
| sitemap-and-scale | 4 | 1 | 2 | 3 | 1/1 (#3) |
| seo-score-and-dashboard | 5 | 1 | 1 | 1 | 2/2 (#1, #2 via adjacent) |
| Totals | 27 | 4 | 9 | 10 | 10/10 |
Severity mix: 2 critical, 14 major, 11 minor, 0 trivial Problems.
| # | Planted issue | Pilot 4 orig | Pilot 4 rerun | Amendment fired |
|---|---|---|---|---|
| 2 | Char count includes HTML entities | ✗ MISSED | caught-exact via adjacent-symptom (multi-byte strlen/mb_strlen in same counter) |
A — inline counters |
| 3 | Sitemap ships password-protected posts | ✗ MISSED | caught-exact as major "privacy leak" | B — seed state variety |
| 4 | Redirects strip query strings | ✗ MISSED | caught-bundled (filed as Question — classification drift) | C — enumerate root-cause surface |
| 6 | Robots.txt no beforeunload | ✗ MISSED | caught-exact — spec-for-bug firing | D — unsaved-work |
| 9 | SEO meta last-write-wins | ✗ MISSED | caught-exact via two-tab probe | E — two-tab concurrent |
| 10 | Single-quote og:title | ✗ MISSED | caught-exact via view-source of raw HTML | F — view-source HTML |
All 4 previously-caught issues stayed caught: #1 (green badge), #5 (+2 counter), #7 (open redirect + bonus javascript: URI), #8 (invalid JSON-LD).
Raw token totals for the whole run, broken down by agent role and by category. Captured by scripts/capture-run-tokens.mjs parsing Claude Code transcripts.
| Manager (Opus 4.7) | Testers (Sonnet 4.6) | Total | |
|---|---|---|---|
| Messages | 191 | 1,015 | 1,206 |
| Fresh input | 396 | 7,303 | 7,699 |
| Output | 185,259 | 126,162 | 311,421 |
| Cache-create 5m | 0 | 2,178,761 | 2,178,761 |
| Cache-create 1h | 490,046 | 0 | 490,046 |
| Cache-read | 24,202,828 | 77,660,601 | 101,863,429 |
| Total tokens | 24,878,529 | 79,972,827 | 104,851,356 |
| Cost | $21.64 | $33.38 | $55.02 |
Observations:
- Testers push ~4× the Manager's tokens (1015 vs 191 messages) — exploration work dominates, as expected.
- Manager uses cache-create 1h (long-lived per-run Manager context). Testers use cache-create 5m (short-lived per-Tester-session context). That's exactly what you want — the Manager's prompt stays stable across all charters so the 1h cache amortizes; each Tester is ephemeral so 5m is enough.
- 97.2% of total tokens are cache-read — prompt caching is doing the heavy lifting on cost.
| Category | Tokens | Cost | % of cost |
|---|---|---|---|
| Cache-read | 101,863,429 | $35.40 | 64.3% |
| Cache-create 5m | 2,178,761 | $8.17 | 14.9% |
| Output | 311,421 | $6.52 | 11.9% |
| Cache-create 1h | 490,046 | $4.90 | 8.9% |
| Fresh input | 7,699 | $0.02 | 0.0% |
Each Tester session produces one report.json + screenshots + console-logs. Ordered by charter slug.
| Charter | Mode | Duration | Tool uses | Msgs | Input | Output | cc5m | cr | Cost |
|---|---|---|---|---|---|---|---|---|---|
| robots-txt-deadui | foreground | 4m 21s | 46 | 68 | 74 | 5,463 | 295,405 | 5,086,283 | $2.72 |
| breadcrumbs-jsonld | foreground | 4m 52s | 47 | 72 | 6,288 | 10,320 | 139,068 | 5,005,247 | $2.20 |
| meta-box-and-title-override | background | 8m 45s | 83 | 131 | 137 | 17,546 | 251,280 | 10,979,504 | $4.50 |
| redirects-manager | background | 8m 22s | 78 | 121 | 127 | 17,275 | 153,055 | 9,841,943 | $3.79 |
| sitemap-and-scale | background | 10m 26s | 64 | 82 | 88 | 14,583 | 192,169 | 6,862,495 | $3.00 |
| seo-score-and-dashboard | background | 8m 21s | 64 | 97 | 103 | 17,262 | 165,927 | 8,291,875 | $3.37 |
| Productive totals | 45m 07s serial | 382 | 571 | 6,817 | 82,449 | 1,196,904 | 46,067,347 | $19.58 |
Concurrent-wave compression: 4 background Testers launched 09:40:05–09:40:21 and finished 09:48:27–09:51:36 — ~11 min wallclock for 36 min sequential work (3.3× compression). The 2 foreground were sequential so compressed nothing (~9m 13s = 9m 13s). Productive wallclock (productive Testers only, ignoring killed first wave): ~20 min.
Notable per-Tester outliers:
sitemap-and-scalehas the longest duration (10m 26s) but fewer messages (82) — it's doing heavybashwork (seeding 10k posts, curl, xmllint) rather than LLM turns.breadcrumbs-jsonldis the cheapest Tester ($2.20) despite making 47 tool calls — relatively short exploration; anchored on 3 Problems with high certainty.meta-box-and-title-overrideis the most expensive ($4.50) — filed 7 Problems + 4 other PQIP items; Tester did the most work and the two-tab concurrent probe + view-source probe both required extra turns.
Total cost was $55.02. Of that, only the 6 sessions that produced report.json files are productive.
| Bucket | Cost | Note |
|---|---|---|
| Manager | $21.64 | one Manager run across all activity |
| Productive Testers (6 successful) | $19.58 | |
| Wasted Testers (6 killed + 1 cancelled) | $13.82 | first wave watchdog reap + one foreground cancellation |
| Productive total | $41.22 | Manager + 6 successful Testers (what a clean run would cost) |
| Actual cost paid | $55.02 | includes all waste |
Wastage: 25% of the run — operational mistake, not harness cost. In a clean run this goes to $0.
| Denominator | Value |
|---|---|
| Actual / planted caught | $5.50 per bug (10 planted caught) |
| Productive-only / planted caught | $4.12 per bug |
| Actual / all Problems filed | $2.04 per Problem (27 Problems) |
| Productive / all Problems | $1.53 per Problem |
For comparison: Pilot 3 rerun (Opus) was ~$7 per planted bug, Pilot 3 Sonnet rerun was ~$1.83 per planted bug. Pilot 4 rerun Sonnet at $4.12 productive sits between — higher than members-rerun because seo-toolkit has more rendering work (view-source, multi-tab, sitemap at scale) vs members' tighter CRUD surface.
First dispatch was a 6-agent concurrent background wave. All 6 were killed simultaneously by Claude Code's stream watchdog at 600s. Partial outputs showed each Tester was actively making amendment-driven findings (apostrophe-break og:title, two-tab concurrent edit, open redirect confirmation) when reaped.
Root cause was NOT a harness issue. The laptop slept while the user was at breakfast → no parent-session token stream → watchdog "Agent stalled: no progress for 600s" on all 6 background agents. The Testers themselves were fine; the parent Claude Code session that spawned them went silent.
Re-dispatch (with laptop kept awake) went clean. Saved to user memory (feedback_background_agents_laptop_sleep.md) for future pilots.
| Amendment | Intended target | Fired? | Where | Effective? |
|---|---|---|---|---|
| A — inline counters | Issue 2 | ✓ | seo-score-and-dashboard (multi-byte strlen, adjacent symptom), meta-box-and-title-override |
✓ |
| B — state variety | Issue 3 | ✓ | sitemap-and-scale |
✓✓ spec-for-bug |
| C — enumerate root-cause | Issue 4 | ~ | redirects-manager — query-strings filed as Question, not Problem (drift) |
~ partial |
| D — unsaved-work | Issue 6 | ✓ | robots-txt-deadui |
✓✓ spec-for-bug |
| E — two-tab concurrent | Issue 9 | ✓ | meta-box-and-title-override |
✓✓ spec-for-bug |
| F — view-source HTML | Issue 10 | ✓ | meta-box-and-title-override, breadcrumbs-jsonld |
✓ |
| Reinforce 5 (empty-state) | coverage | ✓ | sitemap-and-scale + 4 others via coverage-note strings |
✓ |
| Reinforce 8 (cross-feature) | coverage | ✓ | redirects-manager + cross-charter pattern |
✓ |
3 spec-for-bug clean fires (B, D, E), 3 clean-with-drift fires (A, C, F), both reinforcements visible in coverage notes. Amendment C needs tightening — UTM-parameter-stripping should default to Problem, not Question.
| Plugin shape | Original (Sonnet) | Amendments | Rerun (Sonnet) |
|---|---|---|---|
| members (role / CRUD / restriction) | 5/10 | 9 cumulative | 10/10 |
| seo-toolkit (metadata / sitemap / redirects / rendering) | 4/10 | 15 cumulative | 10/10 |
Two very different plugin taxonomies. Both 10/10 on Sonnet-default with the amended harness. Sonnet stays as default. Opus remains available via per-charter model: opus for specifically high-stakes charters.
From the classifier's notes:
- Tighten Amendment C's Question-vs-Problem guidance — "feature silently drops common parameter" (UTM on redirects,
_fbclidon links) is user-visible breakage and should default to Problem, not Question. - Strengthen Amendment F to mandate BOTH symptom seeding AND source inspection — Tester view-sourced and found the single-quote pattern but didn't seed
"It's a test"to confirm live exploit. Two independent evidence streams is more robust than one.
Neither is urgent. Neither changes the 10/10 outcome.
pilot → /escape-analysis → human reviews proposals
→ commit amendments → re-run → /escape-analysis (validation pass)
→ confirm 10/10 → log to docs/harness-retrospectives.md → next pilot
End-to-end automation: 5 shell commands + Agent dispatch for 7 subagents (6 Testers + 1 classifier). Human review is one paragraph of rule text per miss; ~15 minutes of reading.
- Pilot 5 on a further-distinct plugin shape. Candidates:
magellan-pay(payment gateway — new ecosystem),magellan-gallery(media + uploads — file handling),magellan-speed(caching + perf — SFDPOT-Time surface). Pick the one most-unlike prior pilots. - Doc fix shipped in this same commit:
.claude/commands/test-plugin.mdStep 4.6 previously said "For MVP, run sequentially" — corrected to wave-dispatch guidance with enabling-commit citations and the parent-idle caveat.
- Final report:
runs/2026-04-24T08-50-22_magellan-seo-toolkit-rerun/final-report.md - Escape analysis (classifier):
runs/2026-04-24T08-50-22_magellan-seo-toolkit-rerun/escape-analysis.md - Token usage (full detail):
runs/2026-04-24T08-50-22_magellan-seo-toolkit-rerun/token-usage.json - Manifest:
runs/2026-04-24T08-50-22_magellan-seo-toolkit-rerun/manifest.json - 6 session reports:
runs/2026-04-24T08-50-22_magellan-seo-toolkit-rerun/sessions/<slug>/report.json - Pilot 4 orig gist (for comparison): https://gist.github.com/alopezari/8ae6c22a3aec5a8ac67d3a02c3eb47ef