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/bytebase/dbhub/fix-bugnpx skills add bytebase/dbhub --skill fix-buggit clone --depth 1 https://github.com/bytebase/dbhubWhat 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 | $0.00034 | $0.01461 |
| Opus 5 | $0.00017 | $0.00731 |
| Sonnet 5 | $0.00007 | $0.00292 |
| Haiku 4.5 | $0.00003 | $0.00146 |
Grade A, and why
fix-bug 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 yesterday.
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.
Copies of this mod
1 near-identical copy found in the catalogue:
- fix-bug — 100% identical, 0 lines differ
How it starts
The opening of the file, as written. The whole thing — 149 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Fix Bug from GitHub Issue
Systematic workflow for turning a GitHub issue into a working fix in the DBHub codebase.
Workflow
- Fetch → 2. Analyze → 3. Locate → 4. Reproduce → 5. Plan → 6. Implement → 7. Verify → 8. PR
Step 1: Fetch Issue
# From URL: https://github.com/owner/repo/issues/123
gh issue view 123 --json title,body,labels,comments,state
# From another repo
gh issue view 123 --repo owner/repo --json title,body,labels,comments,state
| Input | How to fetch |
|---|---|
https://github.com/owner/repo/issues/42 |
gh issue view 42 --repo owner/repo |
#42 or 42 |
gh issue view 42 (current repo) |
owner/repo#42 |
gh issue view 42 --repo owner/repo |
Step 2: Analyze Issue
Extract from the issue:
- What's broken: Expected vs actual behavior
- Reproduction steps: How to trigger the bug
- Environment: Database type, connection method (DSN, SSH tunnel, TOML config), transport (stdio/HTTP)
- Labels/comments: May reveal affected area or prior investigation
- Linked PRs/issues: Check for related context
Step 3: Locate Relevant Code
Use the issue details to identify which part of the codebase is affected. DBHub has a clear modular structure — most bugs fall into one of these areas:
| Bug Category | Where to Look | Key Files |
|---|---|---|
| Connection failures | Connector implementations | src/connectors/{db-type}/index.ts, src/connectors/manager.ts |
| SQL execution errors | Tool handlers | src/tools/execute-sql.ts, src/utils/allowed-keywords.ts |
| Schema/table listing | Search tool | src/tools/search-objects.ts |
| DSN parsing issues | Parser logic | src/connectors/{db-type}/index.ts (DSNParser), src/utils/dsn-obfuscate.ts, src/utils/safe-url.ts |
| SSH tunnel problems | Tunnel utilities | src/utils/ssh-tunnel.ts, src/utils/ssh-config-parser.ts |
| TOML config issues | Config loading | src/config/toml-loader.ts, src/types/config.ts |
| Multi-database routing | Manager & tools | src/connectors/manager.ts, src/utils/tool-handler-helpers.ts |
| Custom tool issues | Custom handler | src/tools/custom-tool-handler.ts, src/tools/registry.ts |
| HTTP transport | Server setup | src/server.ts |
| Read-only violations | SQL validation | src/utils/allowed-keywords.ts, src/utils/sql-parser.ts |
| Row limiting | SQL rewriting | src/utils/sql-row-limiter.ts |
| API endpoint issues | API handlers | src/api/sources.ts, src/api/requests.ts |
| AWS IAM auth | Token signing | src/utils/aws-rds-signer.ts |
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.
- yesterday First seen · 149 lines · 34 tokens per session scan A 4386ea2e874f
fix-bug is a skill published in the GitHub repository bytebase/dbhub (3,431 stars, last pushed 11d ago), licensed MIT. It adds 34 tokens to every session and 1,461 once invoked, about $0.0002 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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