20B-P4 — Context-Pack Filesystem Retention Report

Date: 2026-05-05 | Status: PASS — wrapper installed, cron armed, initial cleanup executed Prior chain: P1 PASS → P2 PASS → P3 PASS → P4 (this) Scope: FS retention only. No KB mutation, no Đ43 patch.

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§1. Filesystem inspection (pre-cleanup)

Metric	Value
Staging root	/opt/incomex/context-pack-staging/
Total build dirs	141
Disk usage	36 MB
Current symlink	/opt/incomex/context-pack/current
Current target	/opt/incomex/context-pack-staging/20260505-100008-4277ba (today, 12:00 UTC+7)
Oldest dir mtime	2026-04-18 04:34
Newest dir mtime	2026-05-05 12:00
/opt/incomex/dot/bin ownership	incomex:incomex (script installed as root:root, 750)

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§2. Dry-run

Check	Value
Total builds	141
Candidates (mtime +7)	79
Would-remain	62 (≥ MIN_KEEP=3 ✓)
Current target in candidates	no (current is 2026-05-05; oldest candidate 2026-04-18, newest candidate 2026-04-27)
All candidates under STAGING_DIR	yes
Skipped	0

Dry-run output (head/tail):

[context-pack-retention] 2026-05-05T14:01:29Z mode=--dry-run
[context-pack-retention] total_builds=141 candidates=79 would_remain=62 min_keep=3
[context-pack-retention] DRY-RUN would delete: /opt/incomex/context-pack-staging/20260418-023410-514793
...
[context-pack-retention] DRY-RUN would delete: /opt/incomex/context-pack-staging/20260427-130016-653e97
[context-pack-retention] Done. deleted=79 skipped=0 mode=--dry-run

Guards: PASS. Proceed.

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§3. Wrapper

Field	Value
Path	/opt/incomex/dot/bin/dot-context-pack-retention-cleanup
Permissions	-rwxr-x--- (750)
Owner	root:root
Syntax check (bash -n)	PASS
Modes supported	--dry-run (default), --execute
Constants	RETENTION_DAYS=7, MIN_KEEP=3

Guards in script:

1. STAGING_DIR must exist (else abort).
2. WOULD_REMAIN ≥ MIN_KEEP (else abort, no deletes).
3. Each candidate path must literally start with $STAGING_DIR/ (else skip).
4. readlink -f of candidate must not equal current symlink target (else skip).

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§4. Cron

Field	Value
Path	/etc/cron.d/incomex-context-pack-retention
Permissions	-rw-r--r-- (644)
Owner	root:root
Schedule	15 3 * * * (03:15 UTC daily)
Mode	--execute
Log	/var/log/incomex/context-pack-retention.log (appended)

15 3 * * * root /opt/incomex/dot/bin/dot-context-pack-retention-cleanup --execute >> /var/log/incomex/context-pack-retention.log 2>&1

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§5. Execution (initial run, performed)

Metric	Value
Mode	--execute
Dirs candidates	79
Dirs deleted	79
Dirs skipped	0
Dirs remaining	62
Current symlink target intact	YES (20260505-100008-4277ba still resolves to a real dir)
Disk before	36 MB
Disk after	19 MB (−47%)

Tail of execute log:

[context-pack-retention] DELETED: /opt/incomex/context-pack-staging/20260427-040010-5ad6b2
[context-pack-retention] DELETED: /opt/incomex/context-pack-staging/20260427-070009-2abc7e
[context-pack-retention] DELETED: /opt/incomex/context-pack-staging/20260427-100008-35bb3d
[context-pack-retention] DELETED: /opt/incomex/context-pack-staging/20260427-130016-653e97
[context-pack-retention] Done. deleted=79 skipped=0 mode=--execute

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§6. Verdict

PASS.

• Wrapper installed at /opt/incomex/dot/bin/dot-context-pack-retention-cleanup with 4 guards (root, min-keep, prefix, current-target).
• Dry-run validated counts and current-target safety before any delete.
• Cron armed at 03:15 UTC daily, logging to /var/log/incomex/context-pack-retention.log.
• Initial cleanup executed: 79 dirs removed, 62 retained, current symlink intact, 17 MB freed.
• Steady-state expectation: ~24 build dirs (3-hour cron × 8/day × 7 days = 56–62 with some overlap), 5–10 MB.

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§7. Hard boundaries — none crossed

• ❌ No KB delete
• ❌ No Agent Data mutation
• ❌ No search API patch
• ❌ No Đ43 patch
• ❌ No service restart
• ❌ No Pack 2C/IU touched
• ❌ No deletion outside /opt/incomex/context-pack-staging/
• ❌ Current symlink target preserved

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§8. Next

• 20C / Đ43: kb_mirror_status semantics + KB Governance Framework.
• Optional: tomorrow morning, verify cron actually fired (tail /var/log/incomex/context-pack-retention.log) and steady-state count.

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20B-P4 Execution | 2026-05-05 | FS retention armed. Lifecycle complete (P1 faucet → P2 manifest → P3 purge → P4 retention).