Borrowing it
Nothing to install: this file belongs to andrzejchm/fdb. 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/andrzejchm/fdb/main/.agents/skills/implementing-fdb-features/SKILL.mdgit clone --depth 1 https://github.com/andrzejchm/fdbWrote 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/andrzejchm/fdb/implementing-fdb-features)<a href="https://agentmods.dev/skills/andrzejchm/fdb/implementing-fdb-features"><img src="https://agentmods.dev/badge/skills/andrzejchm/fdb/implementing-fdb-features/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/andrzejchm/fdb/implementing-fdb-features"><img src="https://agentmods.dev/badge/skills/andrzejchm/fdb/implementing-fdb-features.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 2 findings, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Agent Snooping · line 36 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
- medium Agent Snooping · line 155 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
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 | $0.00044 | $0.03503 |
| Opus 5.5 | $0.00018 | $0.01401 |
| Sonnet 5.5 | $0.00009 | $0.00701 |
| Haiku 4.5 | $0.00004 | $0.00350 |
Grade A, and why
implementing-fdb-features 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 15d 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 — 386 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Workflow checklist
Copy this into mcp_Todowrite at the start of every feature session and tick off each item as you go:
Capture:
- [ ] Read issue in full and claim it (bd update <id> --claim)
Setup:
- [ ] Create worktree (mcp_Git-worktree create <name> main)
- [ ] Run task setup in the worktree
Implementation:
- [ ] Core models: lib/core/commands/<name>/<name>_models.dart
- [ ] Core verb: lib/core/commands/<name>/<name>.dart
- [ ] CLI adapter: lib/cli/adapters/<name>_cli.dart
- [ ] Register case + usage string in bin/fdb.dart
- [ ] fdb_helper handler (if needed): packages/fdb_helper/lib/src/handlers/<name>_handler.dart
- [ ] Register in fdb_binding.dart (if handler added)
- [ ] Test app changes in example/test_app/lib/main.dart (if needed)
Taskfile tests:
- [ ] test:<command> task added following existing pattern
- [ ] Task added to smoke sequence
- [ ] task analyze passes (dart analyze + dart format + flutter analyze)
Docs:
- [ ] README.md — commands table
- [ ] .agents/skills/testing-fdb/SKILL.md — individual test list
- [ ] lib/skill/SKILL.md — usage examples (load creating-opencode-skills skill first)
- [ ] doc/agent-scenarios.md — add scenario for the new/changed command
Agent scenarios (delegated):
- [ ] Spawn scenarios agent with worktree path + scenario IDs to run
- [ ] Triage every failure: scenario doc fix, pre-existing bug, or regression
- [ ] User approves triage findings before any bug issues are filed
- [ ] All failures resolved (fixed, scenario corrected, or filed as separate bugs)
Review loop (delegated):
- [ ] Spawn reviewing-fixing-loop agent
- [ ] All findings resolved or triaged
Checks (delegated):
- [ ] Spawn checks agent (dart analyze + flutter analyze + dart format)
- [ ] All clean
Platform tests (ALL mandatory before PR):
- [ ] macOS — task test:<command> passes
- [ ] Android physical — task test:<command> passes
- [ ] iOS simulator — task test:<command> passes
- [ ] Full smoke suite: task smoke (Android)
PR:
- [ ] Load humanizing-ai-text skill before writing PR body
- [ ] Load managing-pull-requests skill
- [ ] Push branch
- [ ] Open PR (gh pr create)
- [ ] CI green (gh pr checks --watch)
Merge:
- [ ] bd close <id> + copy issues.jsonl into worktree + commit + push
- [ ] gh pr merge --squash --delete-branch
- [ ] Remove worktree (mcp_Git-worktree remove <name>)
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.
- 15d ago Changed cfab60295446
- 18d ago Changed · +1 lines 148400b0e360
- 24d ago Changed 1ae9b1889373
- 1mo ago First seen · 385 lines · 44 tokens per session scan A dcc1a8e947f5
implementing-fdb-features is a skill published in the GitHub repository andrzejchm/fdb (46 stars, last pushed 12d ago), licensed MIT. It adds 44 tokens to every session and 3,503 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.
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