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 commands/califio/skills/php-unserialize-auditgit clone --depth 1 https://github.com/califio/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/commands/califio/skills/php-unserialize-audit)<a href="https://agentmods.dev/commands/califio/skills/php-unserialize-audit"><img src="https://agentmods.dev/badge/commands/califio/skills/php-unserialize-audit.svg" alt="Measured on agentmods" 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 | $0.00134 | $0.08018 |
| Opus 5 | $0.00067 | $0.04009 |
| Sonnet 5 | $0.00027 | $0.01604 |
| Haiku 4.5 | $0.00013 | $0.00802 |
Grade A, and why
php-unserialize-audit 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 6d 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 — 479 lines — stays where its author put it; the contents beside it link to each section on GitHub.
PHP Unserialize Surface Audit
Purpose: find exploitable bugs in PHP's deserialization surface and related object-lifetime code that is reachable through deserialization. For general PHP engine memory-safety bugs outside the deserialization flow (e.g. the extract() callback-reentrancy UAF, array_walk callback mutations, generic hash-slot UAFs), use the companion /php-audit skill.
The advisory corpus at work/phpcodz/research/pch-0{10,11,14,15,19,20,21,22,25,26,27,28,29,30,31,32,33,34}.md is the ground truth for what "exploitable" looks like here — re-read one or two before starting if you are unfamiliar.
Usage
/php-unserialize-audit <target> [focus]
Target can be:
- an extension name:
spl,date,gmp,soap,session,phar,standard,sqlite3,pdo,intl,wddx - a specific file:
ext/spl/spl_array.c,ext/standard/var_unserializer.re - a class/subsystem:
SplObjectStorage,SoapFault,Exception::getTraceAsString - a broad category:
unserialize,session-deserializer,magic-methods,custom-unserializers,all
Examples:
/php-unserialize-audit spl/php-unserialize-audit unserialize "UAF via R: back-references"/php-unserialize-audit ext/date/php_date.c/php-unserialize-audit session "multi-entry decode UAF"/php-unserialize-audit magic-methods "type confusion in __toString"/php-unserialize-audit all "double-free"
Source tree
PHP sources live at /home/x/kernel/php_old/work/src/php-<version>/. The primary target versions are PHP 5.4.x–5.6.x (matches the advisory corpus), but the same bug classes appear in PHP 7.x with different zval layout. Check which version the user intends; if unspecified, default to php-5.5.14 (the version most PoCs target). Extract the tarball if no extracted tree exists:
cd /home/x/kernel/php_old/work/src && tar xzf php-5.5.14.tar.gz
Bug taxonomy (derived from phpcodz corpus)
Every class below has at least one confirmed instance in the advisory corpus. Use this as the hunting checklist. For each finding, map it to a U-class so the synthesis pass can deduplicate.
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.
- 6d ago First seen · 479 lines · 0 tokens per session scan A c5848e0bcade
php-unserialize-audit is a command published in the GitHub repository califio/skills (59 stars, last pushed 4mo ago), licensed MIT. It adds 134 tokens to every session and 8,018 once invoked, about $0.0007 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.
Other commands, from other repositories
checklist
Generate a custom checklist for the current feature based on user requirements.
clarify
Identify underspecified areas in the current feature spec by asking up to 5 highly targeted clarification questions and encoding answers back into the spec.
specify
Create or update the feature specification from a natural language feature description.
converge
Assess the current codebase against the feature's spec, plan, and tasks, then append any remaining unbuilt work as new tasks to tasks.md so implement can complete it.
implement
Execute the implementation plan by processing and executing all tasks defined in tasks.md.
analyze
Perform a non-destructive cross-artifact consistency and quality analysis across spec.md, plan.md, and tasks.md after task generation.