7-Day March Post-Fest Evidence Sprint Challenge - 2026

Monday stand-up: new enemy AI merged. Tuesday: Spring sale capsule draft. Wednesday: producer asks for February fest annex paths—and february_fest_closeout_receipt_v1.json still lists jsonl_annex[] nobody opened. Monday debrief facilitator card filed Sunday night. Velocity listicle stack exports started D+1. By Thursday, engineering shipped three features and zero annex rows were consumed onto BUILD_RECEIPT.

March 2027 post-fest sprints punish teams that treat fest evidence as archive while feature work resumes. Sunday closeout indexed paths; Monday debrief printed hooks—this Challenges & Community Hooks sprint is the seven-night accountability ladder: one BUILD_RECEIPT row consumed per night, gates E1–E7, file march_post_fest_evidence_challenge_receipt_v1.json, hashtag #MarchPostFestEvidence2027.

Non-repetition note: 7-day February RC challenge owns pre-live RC smoke + row review C1–C7. 5-night pager challenge owns live-week nights. Velocity tools listicle owns daily export V1–V6. This URL owns post-fest evidence consumption during March feature sprint—cousin format, different gates.

Pair February RC challenge, March cluster #1–#3, forward blog #8 jq weekly diff, empty annex recovery case study (#5 published).

Why this matters now (March 2027 post-fest sprint)

1. Feature velocity ≠ evidence velocity — Merges feel productive while annex jsonl stays orphaned.
2. Partner follow-up — Diligence calls reference Monday debrief card paths—empty consumption fails audit.
3. Velocity without annex — Daily export tools prove wishlist ratio; sprint proves fest receipts latched.
4. BUILD_RECEIPT sprawl — Seven nights prevent "we'll index annexes later" from becoming April debt.
5. Forward jq weekly diff — Blog #8 expects march_post_fest_evidence_ok before weekly row diff ritual.

Direct answer: Seven nights (~15–20 minutes each); gates E1–E7; artifacts under release-evidence/post-fest/sprint-2027-W10/; file march_post_fest_evidence_challenge_receipt_v1.json; no April content update promotion until E7 and march_post_fest_evidence_ok: true on BUILD_RECEIPT.

Who this challenge is for

Prerequisites: Sunday closeout C1–C10 GREEN; Monday debrief card D1–D6 GREEN; velocity tools stack started (V1 minimum).
Time: ~2 hours total over seven nights.

Challenge vs cousins (format ladder)

Order: Monday debrief → velocity exports → this 7-night challenge → April content update.

Rules of the challenge

1. One owner signs each night (night_N_pass in receipt).
2. Fail stops the ladder—do not ship April capsule refresh on Night 5 if Night 4 annex sha256 RED.
3. One BUILD_RECEIPT row per night—document row_key consumed.
4. Pair Thursday row review optional Night 7 cousin diff.
5. Post nightly progress with #MarchPostFestEvidence2027.
6. Hotfix that changes build_label requires annex re-index from Night 3—do not edit prior night JSON in place.
7. Producer blocks April content push until E7 receipt filed.

Seven-night calendar at a glance

Nights are calendar nights after fest debrief week—solo devs batch Weekend Night 6–7 if weekdays are feature-heavy. Document swaps in receipt notes.

Before you start — readiness checklist

• [ ] release-evidence/post-fest/sprint-2027-W10/ folder exists
• [ ] Sunday closeout receipt on disk with non-empty jsonl_annex[]
• [ ] Monday facilitator receipt D6 GREEN
• [ ] Velocity roster filed
• [ ] VELOCITY_DEFINITION.md signed
• [ ] Producer agrees: no April content push until E7
• [ ] #MarchPostFestEvidence2027 thread or Discord channel chosen
• [ ] Nightly stand-up script printed (below)

Do not start without Sunday closeout annex—run empty annex recovery case study (March cluster #5) first if annex empty, then restart ladder at Night 1.

Nightly stand-up script (beginner)

## Post-fest evidence stand-up — Night {N}/7

- Gate: E{N}
- BUILD_RECEIPT row: `{row_key}`
- Annex path: `{path}`
- sha256: `{hash}`
- Owner sign-off: ______
- #MarchPostFestEvidence2027 posted: Y/N

Night 1 — E1 Monday debrief facilitator latch (~20 minutes)

Goal: Prove Monday debrief facilitator card D1–D6 consumed onto BUILD_RECEIPT.

Beginner devlog: "Night 1 — facilitator card latched. Annex index path on disk. Tomorrow: velocity partial."

RED routing: Run Monday D1–D6 evening before Night 2—do not consume velocity rows on false debrief card.

Night 2 — E2 velocity receipt partial (~15 minutes)

Goal: Latch velocity listicle V1–V4 minimum (≥3 daily jsonl lines post-fest).

Full V6 may complete after Night 7—E2 requires partial honesty, not fake post_fest_wishlist_velocity_ok: true.

Night 3 — E3 Sunday annex index sha256 walk (~20 minutes)

Goal: Walk Sunday closeout jsonl_annex[]—every path exists; sha256 pinned in sprint jsonl.

#!/usr/bin/env bash
set -euo pipefail
INDEX="$(jq -r '.annex_index_path' release-evidence/post-fest/debrief/POST_FEST_DEBRIEF_FACILITATOR_RECEIPT.json)"
while IFS= read -r path; do
  test -f "$path" || { echo "MISSING: $path"; exit 1; }
  sha256sum "$path"
done < <(jq -r '.[].path' "$INDEX")

Fail-closed: Missing annex → stop ladder; pair blog #5 recovery.

Night 4 — E4 hour-one funnel annex row (~15 minutes)

Goal: Consume hour-one funnel annex—verify D7 row + receipt cousin link.

Developer: jq diff D7 hour_one_quit_rate vs refund worksheet lag narrative in notes.

Night 5 — E5 refund daily jsonl tail (~15 minutes)

Goal: Consume refund spike annex—last jsonl line matches BUILD_RECEIPT threshold story.

RED routing: If refund jsonl stops before D7, document waiver from Sunday closeout notes—undeclared gap fails E5.

Night 6 — E6 HOTFIX exception count match (~15 minutes)

Goal: Consume HOTFIX opinion annex—exceptions[].length == hotfix_exception_count.

jq -e '
  (.exceptions | length) == .hotfix_exception_count
' release-evidence/february-live/hotfix/hotfix_exception_list_receipt_v1.json
jq -e --argjson n "$(jq '.exceptions|length' hotfix_exception_list_receipt_v1.json)" \
  '.hotfix_exception_count == $n' BUILD_RECEIPT.json

Night 7 — E7 challenge capstone (~30 minutes)

Goal: File master challenge receipt; set BUILD_RECEIPT march_post_fest_evidence_ok: true; authorize April content review.

march_post_fest_evidence_challenge_receipt_v1.json (schema)

{
  "schema": "march_post_fest_evidence_challenge_receipt_v1",
  "iso_week": "2027-W10",
  "hashtag": "#MarchPostFestEvidence2027",
  "fest_window": "2027-02-next-fest-live",
  "gates": {
    "E1": "GREEN",
    "E2": "GREEN",
    "E3": "GREEN",
    "E4": "GREEN",
    "E5": "GREEN",
    "E6": "GREEN",
    "E7": "GREEN"
  },
  "nights": {
    "night_1": { "gate": "E1", "pass": true, "row_key": "post_fest_debrief_card_ok", "evidence": "release-evidence/post-fest/sprint-2027-W10/night1-debrief-latch.json" },
    "night_2": { "gate": "E2", "pass": true, "row_key": "velocity_last_export_utc", "evidence": "release-evidence/analytics/post_fest_wishlist_velocity_daily_log.jsonl" },
    "night_3": { "gate": "E3", "pass": true, "row_key": "february_fest_closeout_ok", "evidence": "release-evidence/post-fest/sprint-2027-W10/march_sprint_annex_sha256_log.jsonl" },
    "night_4": { "gate": "E4", "pass": true, "row_key": "hour_one_funnel_snapshot_ok", "evidence": "release-evidence/post-fest/sprint-2027-W10/night4_hour_one_funnel_consumed.json" },
    "night_5": { "gate": "E5", "pass": true, "row_key": "refund_spike_watch_ok", "evidence": "release-evidence/post-fest/sprint-2027-W10/night5_refund_tail.json" },
    "night_6": { "gate": "E6", "pass": true, "row_key": "hotfix_exception_list_ok", "evidence": "release-evidence/post-fest/sprint-2027-W10/night6_hotfix_consumed.json" },
    "night_7": { "gate": "E7", "pass": true, "signed_at_utc": "2027-03-08T22:00:00Z" }
  },
  "march_post_fest_evidence_ok": true,
  "april_content_push_authorized": true,
  "cousin_receipts": {
    "monday_debrief": "release-evidence/post-fest/debrief/POST_FEST_DEBRIEF_FACILITATOR_RECEIPT.json",
    "sunday_closeout": "release-evidence/february-live/FEBRUARY_FEST_CLOSEOUT_RECEIPT.json",
    "velocity": "release-evidence/analytics/POST_FEST_WISHLIST_VELOCITY_RECEIPT.json"
  },
  "notes": "Seven-night ladder; velocity V6 completed Night 7"
}

BUILD_RECEIPT root rows (Night 7 commit)

{
  "post_fest_debrief_card_ok": true,
  "february_fest_closeout_ok": true,
  "hour_one_funnel_snapshot_ok": true,
  "refund_spike_watch_ok": true,
  "hotfix_exception_list_ok": true,
  "post_fest_wishlist_velocity_ok": true,
  "march_post_fest_evidence_ok": true,
  "march_post_fest_evidence_challenge_receipt": "release-evidence/post-fest/sprint-2027-W10/march_post_fest_evidence_challenge_receipt_v1.json"
}

verify_march_post_fest_evidence_challenge.sh

#!/usr/bin/env bash
set -euo pipefail
REC="${1:-release-evidence/post-fest/sprint-2027-W10/march_post_fest_evidence_challenge_receipt_v1.json}"
jq -e '.schema == "march_post_fest_evidence_challenge_receipt_v1"' "$REC" || exit 1
jq -e '.march_post_fest_evidence_ok == true' "$REC" || exit 6
for g in E1 E2 E3 E4 E5 E6 E7; do
  jq -e --arg g "$g" '.gates[$g] == "GREEN"' "$REC" || exit 2
done
echo "march_post_fest_evidence_challenge verify: OK"

jq gate sketch (working dev)

jq -e '
  .march_post_fest_evidence_ok == true
  and (.gates | .E1, .E2, .E3, .E4, .E5, .E6, .E7 | . == "GREEN")
' march_post_fest_evidence_challenge_receipt_v1.json

PowerShell cousin:

$rec = Get-Content "release-evidence/post-fest/sprint-2027-W10/march_post_fest_evidence_challenge_receipt_v1.json" | ConvertFrom-Json
if (-not $rec.march_post_fest_evidence_ok) { exit 6 }
Write-Host "march_post_fest_evidence_challenge verify: OK"

Proof table

Scenarios A–G

Community hook — #MarchPostFestEvidence2027

Nightly post template:

#MarchPostFestEvidence2027 Night {N}/7 — Gate E{N} GREEN
BUILD_RECEIPT row: {row_key}
annex: {path or n/a}
evidence: release-evidence/post-fest/sprint-2027-W10/night{N}/
BLOCKED: April content push until E7

Why public posts help: Feature stand-ups cannot claim "fest evidence done" without nightly row keys.

Printable sign-off card

# March post-fest evidence sprint (7 nights)

□ Night 1 — post_fest_debrief_card_ok
□ Night 2 — velocity jsonl ≥3 lines
□ Night 3 — annex sha256 walk
□ Night 4 — hour_one_funnel_snapshot_ok
□ Night 5 — refund_spike_watch_ok tail
□ Night 6 — hotfix_exception_list_ok match
□ Night 7 — march_post_fest_evidence_ok + producer sign-off
Post: #MarchPostFestEvidence2027 each night

Comparison pack (challenge vs cousins)

BUILD_RECEIPT row catalog (nights)

CI hook sketch (post E7)

jobs:
  march-evidence-sprint:
    if: github.ref == 'refs/heads/march-sprint-2027'
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - run: bash scripts/verify_march_post_fest_evidence_challenge.sh
      - run: jq -e '.march_post_fest_evidence_ok == true' release-evidence/BUILD_RECEIPT.json

Common mistakes

Shipping features before Night 3 — Annex paths may move; sha256 walk fails.

Setting velocity_ok Night 2 with one export — E2 allows partial flag only—V6 on Night 7.

Skipping HOTFIX night because fest ended — Post-fest diligence still reads exception integers.

Editing challenge receipt nights in place — Bump receipt_version; new file per rerun.

Confusing this with February RC challenge — Different fest phase, different gates.

Extended scenarios H–L

H — Velocity RED band Night 2
Continue ladder—E2 only requires jsonl lines; velocity band routes to plateau playbook in stand-up action field.

I — jq hourly annex optional
If team skipped blog #8 hourly during fest, document waiver in Night 3 jsonl—do not invent paths.

J — Producer wants April push Night 5
E7 incomplete—partial nights 1–5 zip for partner preview only; april_content_push_authorized stays false.

K — Re-run after HOTFIX-003 post-fest
Restart Night 6–7 only; archive prior challenge receipt with superseded_by path.

L — Two producers sign conflicting nights
Receipt owner field is single string—escalate in #fest-ops before Night 7.

Worked example — Nights 1–3 (synthetic)

Devlog Night 3:

#MarchPostFestEvidence2027 Night 3/7 — E3 GREEN
BUILD_RECEIPT row: february_fest_closeout_ok
annex walk: 6/6 paths sha256 pinned
evidence: sprint-2027-W10/march_sprint_annex_sha256_log.jsonl

Partner diligence zip (Night 7)

#!/usr/bin/env bash
set -euo pipefail
OUT="release-evidence/post-fest/sprint-2027-W10/partner-march-evidence-sprint.zip"
zip -j "$OUT" release-evidence/post-fest/sprint-2027-W10/march_post_fest_evidence_challenge_receipt_v1.json
zip -u "$OUT" release-evidence/post-fest/sprint-2027-W10/march_sprint_annex_sha256_log.jsonl
zip -u "$OUT" release-evidence/post-fest/sprint-2027-W10/night*.json
echo "partner sprint zip: $OUT"

Troubleshooting

Integration with March cluster

Closing

Post-fest March is when teams prove February fest evidence survived the urge to ship features. Seven nights beats one heroic Sunday. Beginners follow the sign-off card; working devs wire verify_march_post_fest_evidence_challenge.sh; producers hold April content until E7 GREEN. Pair velocity exports for daily ratios and this ladder for annex consumption—both required, neither replaces the other.

Key takeaways

1. March sprint needs nightly evidence consumption—not one Monday debrief.
2. march_post_fest_evidence_challenge_receipt_v1.json gates E1–E7.
3. One BUILD_RECEIPT row per night—document row_key in receipt.
4. Pair Monday debrief #1 Night 1 latch.
5. Pair velocity listicle #3 Night 2 partial.
6. Pair February RC challenge as pre-live cousin.
7. Forward #8 jq weekly diff expects march_post_fest_evidence_ok — published jq March sprint weekly with J2 closeout pointer.
8. Forward #5 empty annex recovery if Night 3 fails.
9. #MarchPostFestEvidence2027 for community accountability.
10. verify_march_post_fest_evidence_challenge.sh gives CI one exit code.
11. Sunday closeout annex is Night 3 walk input.
12. March cluster #4 consumed—#5 partner case study next.

FAQ

Is this replacing the velocity listicle?
No—listicle owns V1–V6 exports; challenge owns annex consumption nights.

Can we run days instead of nights?
Yes—document schedule in receipt notes; gates unchanged.

Same hashtag as February RC?
No—#MarchPostFestEvidence2027 vs #FebruaryRCSmoke2027.

What if annex was empty?
Stop ladder; run forward #5 recovery case study.

Does this block all feature work?
No—blocks April content push authorization until E7 unless producer waiver.

How does jq weekly diff (#8) relate?
Weekly diff runs after E7 capstone—cousin ritual, not replacement. File march_post_fest_evidence_ok before starting blog #8 jq weekly pass.

Related GamineAI reads

• Monday post-fest debrief facilitator card
• 16 velocity export tools
• Sunday February fest closeout
• 7-day February RC challenge
• Hour-one funnel snapshot
• Forward: Partner empty annex case study (#5)
• Forward: jq March post-fest sprint weekly diff (#8)

Ship features and consume evidence—seven nights, seven BUILD_RECEIPT rows, one march_post_fest_evidence_challenge_receipt_v1.json, then authorize April content with proof—not folklore.