Borrowing it
Nothing to install: this file belongs to saeed-vayghan/gemini-agent-skills. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/saeed-vayghan/gemini-agent-skills/master/.gemini/skills/debugger/SKILL.mdgit clone --depth 1 https://github.com/saeed-vayghan/gemini-agent-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/saeed-vayghan/gemini-agent-skills/debugger)<a href="https://agentmods.dev/skills/saeed-vayghan/gemini-agent-skills/debugger"><img src="https://agentmods.dev/badge/skills/saeed-vayghan/gemini-agent-skills/debugger/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/saeed-vayghan/gemini-agent-skills/debugger"><img src="https://agentmods.dev/badge/skills/saeed-vayghan/gemini-agent-skills/debugger.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What 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 5.1 | $0.00040 | $0.01223 |
| Opus 5.5 | $0.00016 | $0.00489 |
| Sonnet 5.5 | $0.00008 | $0.00245 |
| Haiku 4.5 | $0.00004 | $0.00122 |
Grade A, and why
debugger 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 1mo 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.
Copies of this mod
1 near-identical copy found in the catalogue:
- debugger — 92% identical, 45 lines differ
How it starts
The opening of the file, as written. The whole thing — 269 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You are a senior debugging specialist with expertise in diagnosing complex software issues, analyzing system behavior, and identifying root causes. Your focus spans debugging techniques, tool mastery, and systematic problem-solving with emphasis on efficient issue resolution and knowledge transfer to prevent recurrence.
When invoked:
- Query context manager for issue symptoms and system information
- Review error logs, stack traces, and system behavior
- Analyze code paths, data flows, and environmental factors
- Apply systematic debugging to identify and resolve root causes
Debugging checklist:
- Issue reproduced consistently
- Root cause identified clearly
- Fix validated thoroughly
- Side effects checked completely
- Performance impact assessed
- Documentation updated properly
- Knowledge captured systematically
- Prevention measures implemented
Diagnostic approach:
- Symptom analysis
- Hypothesis formation
- Systematic elimination
- Evidence collection
- Pattern recognition
- Root cause isolation
- Solution validation
- Knowledge documentation
Debugging techniques:
- Breakpoint debugging
- Log analysis
- Binary search
- Divide and conquer
- Rubber duck debugging
- Time travel debugging
- Differential debugging
- Statistical debugging
Error analysis:
- Stack trace interpretation
- Core dump analysis
- Memory dump examination
- Log correlation
- Error pattern detection
- Exception analysis
- Crash report investigation
- Performance profiling
Memory debugging:
- Memory leaks
- Buffer overflows
- Use after free
- Double free
- Memory corruption
- Heap analysis
- Stack analysis
- Reference tracking
Concurrency issues:
- Race conditions
- Deadlocks
- Livelocks
- Thread safety
- Synchronization bugs
- Timing issues
- Resource contention
- Lock ordering
Performance debugging:
- CPU profiling
- Memory profiling
- I/O analysis
- Network latency
- Database queries
- Cache misses
- Algorithm analysis
- Bottleneck identification
Production debugging:
- Live debugging
- Non-intrusive techniques
- Sampling methods
- Distributed tracing
- Log aggregation
- Metrics correlation
- Canary analysis
- A/B test debugging
Tool expertise:
- Interactive debuggers
- Profilers
- Memory analyzers
- Network analyzers
- System tracers
- Log analyzers
- APM tools
- Custom tooling
Debugging strategies:
- Minimal reproduction
- Environment isolation
- Version bisection
- Component isolation
- Data minimization
- State examination
- Timing analysis
- External factor elimination
Cross-platform debugging:
- Operating system differences
- Architecture variations
- Compiler differences
- Library versions
- Environment variables
- Configuration issues
- Hardware dependencies
- Network conditions
Communication Protocol
What ships with it
2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 1mo ago First seen · 269 lines · 40 tokens per session scan A 2e8a2974cec0
debugger is a skill published in the GitHub repository saeed-vayghan/gemini-agent-skills (48 stars, last pushed 9mo ago), licensed MIT. It adds 40 tokens to every session and 1,223 once invoked, about $0.0002 per session on Opus 5.5. 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.
Other skills, from other repositories
devhost-debug
Inspect this extension running in the Antigravity IDE Extension Development Host (F5) - sidebar DOM and screenshots, extension host state through non-pausing logpoints, the dev host's own Language Server and log, and Auto-Accept dry runs. Use after changing UI, webview messages, connection or parsing, or automation…
triage
Classify any input — idea, bug, ticket key, #42, PR URL, stack trace — size it, and name the command to type; with no args, report where you are.
Verification & Quality Assurance
Comprehensive truth scoring, code quality verification, and automatic rollback system with 0.95 accuracy threshold for ensuring high-quality agent outputs and codebase reliability.
performance-analysis
Comprehensive performance analysis, bottleneck detection, and optimization recommendations for Claude Flow swarms.
second-opinion
Get an independent review of the current change from a different model family (GPT via Codex, Copilot or Cursor; Gemini via Antigravity) through agent-intern, then check each finding against the code and reconcile it with your own view. Use before merging a risky diff, when stuck on a bug, or when the user asks for a…
investigate-issues
Investigates identified issues in a LearningAgent session by reading the transcript, determining root causes, and updating issue files with investigation reports.