Append Only Sidechain Transcripts
Persist every subagent transcript entry by appending with explicit parent UUIDs so transcripts become a linear, resumable sidechain.
Install
$ agentstack add skill-ychampion-cskill-agents-append-only-sidechain-transcripts ✓ scanned · ✓ verified, works with Claude Code, Cursor, and more.
Security review
✓ PassedNo issues found. Passed automated security review. · v0.1.0 How review works →
- ✓ Prompt-injection patterns
- ✓ Secret / credential exfiltration
- ✓ Dangerous shell & filesystem operations
- ✓ Untrusted network calls
- ✓ Known-malicious package signatures
What it can access
- ✓ Network access No
- ✓ Filesystem access No
- ✓ Shell / process execution No
- ✓ Environment & secrets No
- ✓ Dynamic code execution No
From automated source analysis of v0.1.0. “Used” means the capability is present in the source — more access means more to trust, not that it’s unsafe.
Verified badge
Passed review? Show it. Paste this badge into your README, it links to the public security report.
Links to your public security report.[](https://agentstack.voostack.com/security/report/skill-ychampion-cskill-agents-append-only-sidechain-transcripts) Reliability & compatibility
Declared compatibility
Compatibility is declared by the source manifest. End-to-end runtime verification is coming, see below.
We're building live execution health for every listing: tool-call success rate, median latency, uptime, and last-checked timestamps, measured, not self-reported. It isn't live yet, so we don't show numbers we can't stand behind.
How agent discovery & health will work →About
SKILL: Append-Only Sidechain Transcripts
Domain: session-storage Trigger: Subagent transcript persistence must stay append-only so forked history can be resumed and sidechain readers see messages in strict chronological order. Source Pattern: Distilled from reviewed subagent orchestration, isolation, and lifecycle implementations.
Core Method
Model each subagent transcript as an append-only event log with explicit ordering links or sequence checkpoints. Persist the seed messages once at startup, then append only durable milestones as the run progresses, ignoring ephemeral stream fragments that are not worth replaying later. Advance the transcript cursor only after a durable record is safely written so resumes, forks, and sidechain readers can reconstruct history in strict order without duplication.
Key Rules
- Never rewrite, truncate, or backfill earlier transcript entries once they have been committed.
- Filter out ephemeral deltas and other transient stream fragments so the stored transcript contains only meaningful replay points.
- Advance the ordering cursor only after a durable write succeeds.
- Partition transcript storage by agent or workflow so replay stays local and sidechains do not collide.
Example Application
When a workflow manager resumes a paused child agent, it can replay the append-only transcript to rebuild context exactly once and continue from the last durable checkpoint.
Anti-Patterns
- Writing directly from raw streaming deltas or duplicating seed messages will corrupt the append-only history.
- Advancing the cursor before persistence succeeds can create gaps, races, or duplicate replay on resume.
Source & license
This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.
- Author: ychampion
- Source: ychampion/cskill-agents
- License: MIT
- Homepage: https://x.com/YashasGunderia/status/2039990540016693692?s=20
Install and usage instructions live in the source repository linked above.
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Versions
- v0.1.0 Imported from the upstream source.