Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/joshsymonds/savecraft.gg/debugging-durable-objectsnpx skills add joshsymonds/savecraft.gg --skill debugging-durable-objectsgit clone --depth 1 https://github.com/joshsymonds/savecraft.ggWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00095 | $0.01517 |
| Opus 5 | $0.00048 | $0.00758 |
| Sonnet 5 | $0.00019 | $0.00303 |
| Haiku 4.5 | $0.00010 | $0.00152 |
Grade A, and why
debugging-durable-objects scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 129 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Debugging Durable Objects
Use the admin introspection API to diagnose SourceHub and UserHub issues. Full architecture details in docs/worker.md under "Debug Introspection".
Auth
All admin endpoints require Authorization: Bearer $ADMIN_API_KEY.
| Environment | Where the key lives |
|---|---|
| Production | wrangler secret (set via wrangler secret put ADMIN_API_KEY --env production) |
| Staging | wrangler secret (set via wrangler secret put ADMIN_API_KEY --env staging) |
| Local dev | worker/.dev.vars → ADMIN_API_KEY=... |
| Tests | worker/vitest.config.ts miniflare bindings |
Base URLs: production https://api.savecraft.gg, staging https://staging-api.savecraft.gg, local http://localhost:8787.
Endpoints
Discovery (D1)
| Endpoint | Returns |
|---|---|
GET /admin/sources |
All sources: source_uuid, user_uuid, hostname, source_kind, timestamps. Capped at 200. |
GET /admin/source/:uuid/events?limit=N |
D1 source_events rows (default 50, max 500). Includes event_type, event_data, created_at. |
SourceHub Debug (per-source DO)
| Endpoint | Returns |
|---|---|
GET /admin/source/:uuid/debug/state |
sourceState (sources array with online/lastSeen/games), sourceUuid, userUuid, sourceMeta, alarm timestamp |
GET /admin/source/:uuid/debug/connections |
daemonCount, connections array with tags per socket |
GET /admin/source/:uuid/debug/log?level=X&limit=N |
Ring buffer entries (newest first). Levels: debug, info, warn, error. Limit capped at 200. |
GET /admin/source/:uuid/debug/storage |
All DO transactional storage key names |
UserHub Debug (per-user DO)
| Endpoint | Returns |
|---|---|
GET /admin/user/:uuid/debug/state |
mergedState (all sources merged), userUuid |
GET /admin/user/:uuid/debug/connections |
uiCount (active UI WebSocket count) |
GET /admin/user/:uuid/debug/log?level=X&limit=N |
Ring buffer entries. Same filters as SourceHub. |
GET /admin/user/:uuid/debug/storage |
All DO storage key names |
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2d ago First seen · 129 lines · 95 tokens per session scan A d1f6ecfe9b2f
debugging-durable-objects is a skill published in the GitHub repository joshsymonds/savecraft.gg (12 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 95 tokens to every session and 1,517 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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