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/mtvrkan/senior-dev-kit/project-memorynpx skills add mtvrkan/senior-dev-kit --skill project-memorygit clone --depth 1 https://github.com/mtvrkan/senior-dev-kitWrote 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/mtvrkan/senior-dev-kit/project-memory)<a href="https://agentmods.dev/skills/mtvrkan/senior-dev-kit/project-memory"><img src="https://agentmods.dev/badge/skills/mtvrkan/senior-dev-kit/project-memory.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 | $0.00039 | $0.00426 |
| Opus 5 | $0.00019 | $0.00213 |
| Sonnet 5 | $0.00008 | $0.00085 |
| Haiku 4.5 | $0.00004 | $0.00043 |
Grade A, and why
project-memory 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 3d 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
project-memory
Maintain .claude/PROJECT-MEMORY.md — durable project facts not in the code or git history (why a decision was made, a footgun that cost time, a convention written nowhere else). Not personal preferences — that's the user's own ~/.claude memory, out of scope here.
- Read the existing file first if present — update/extend an entry, never duplicate it.
- Structure as dated bullets under
## Decisions/## Gotchas/## Conventions/## Open questions— one line each, with a one-clause "why." - Write only what would change a future decision or prevent repeating a mistake — skip what's obvious from the code.
- Never record secrets, credentials, or PII, even paraphrased inside a decision/gotcha note — write "rotated the prod DB credential after a leak" not the credential itself, "tenant X hit the null-address bug" not their email. Same NEVER READ OR OUTPUT list as everywhere else in the kit.
- At session start, read the file before unfamiliar work if it exists; verify stale-looking entries against current code before acting on them.
- Trigger on: "remember this" / "note this for later," before a planned
/clearwith unresolved context, or after a confirmed architecture decision / resolved non-obvious bug. - Keep the file under ~150 lines — propose trimming superseded entries instead of appending forever.
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.
- 3d ago First seen · 22 lines · 39 tokens per session scan A c46b5bb1fdf8
project-memory is a skill published in the GitHub repository mtvrkan/senior-dev-kit (5 stars, last pushed 14d ago), licensed MIT. It adds 39 tokens to every session and 426 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 2026-08-31.
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