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 skills add dev-toolings/superpowers-symfony --skill strategy-patterngit clone --depth 1 https://github.com/dev-toolings/superpowers-symfonyWrote 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/dev-toolings/superpowers-symfony/strategy-pattern)<a href="https://agentmods.dev/skills/dev-toolings/superpowers-symfony/strategy-pattern"><img src="https://agentmods.dev/badge/skills/dev-toolings/superpowers-symfony/strategy-pattern/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/dev-toolings/superpowers-symfony/strategy-pattern"><img src="https://agentmods.dev/badge/skills/dev-toolings/superpowers-symfony/strategy-pattern.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00019 | $0.00351 |
| Opus 5.5 | $0.00008 | $0.00140 |
| Sonnet 5.5 | $0.00004 | $0.00070 |
| Haiku 4.5 | $0.00002 | $0.00035 |
Grade A, and why
strategy-pattern 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 17d 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.
What it actually says
Strategy Pattern (Symfony)
Use when
- One operation has several interchangeable algorithms chosen at runtime, such as payment providers or export formats.
- A
switchormatchon a type string keeps growing. - New variants must be added without editing the code that selects them.
Default workflow
- Define the strategy interface, with a
supports()method or a key per strategy. - Tag every implementation through
#[AutoconfigureTag]on the interface or on each class. - Inject them with
#[AutowireIterator]to try each in order, or#[AutowireLocator]to fetch one by key. - Set priorities where evaluation order matters, and register a fallback strategy.
- Test each strategy alone, and the selector with fakes.
Guardrails
- The selector fails explicitly when no strategy supports the input.
- Keep strategies stateless and independent of each other.
- Two cases that will not grow do not need the pattern: a
matchis enough.
Progressive disclosure
- Use this file for execution posture and risk controls.
- Open references when deep implementation details are needed.
Output contract
- The interface and its tagged implementations.
- The selector, with its order and its fallback.
- Tests per strategy and for the no-match case.
References
reference.md
What ships with it
1 file 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.
- 17d ago Changed · +1 lines f9894e8c14e7
- 1mo ago Changed · +2 lines · -3 tokens per session e46301abf787
- 1mo ago First seen · 40 lines · 22 tokens per session scan A 135a38c13546
strategy-pattern is a skill published in the GitHub repository dev-toolings/superpowers-symfony (226 stars, last pushed 17d ago), licensed MIT. It adds 19 tokens to every session and 351 once invoked, about $0.0001 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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