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 msolecki/founder-os --skill monthly-reviewgit clone --depth 1 https://github.com/msolecki/founder-osWrote 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/msolecki/founder-os/monthly-review)<a href="https://agentmods.dev/skills/msolecki/founder-os/monthly-review"><img src="https://agentmods.dev/badge/skills/msolecki/founder-os/monthly-review/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/msolecki/founder-os/monthly-review"><img src="https://agentmods.dev/badge/skills/msolecki/founder-os/monthly-review.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 | $0.00025 | $0.01603 |
| Opus 5 | $0.00013 | $0.00801 |
| Sonnet 5 | $0.00005 | $0.00321 |
| Haiku 4.5 | $0.00003 | $0.00160 |
Grade A, and why
monthly-review 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 10d 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 — 137 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Monthly Review
A month is the shortest period in which a company of one can quietly become a different company. Nobody announces it. The founder takes one urgent project, then another like it, and four months later the charter describes a business that no longer exists. This is the retrospective that catches that.
This is not the close. The CFO produces the numbers in metrics.md; you
read them and say what they mean. Never restate a number you did not read from
metrics.md this session.
When to use
First working day after the CFO's close — revenue-review — lands in
metrics.md.
This skill has no scheduled task, and that is deliberate rather than an
oversight. revenue-review already fires on the 1st and writes the numbers;
scheduling a second monthly ritual against the same month would give the founder
two competing retrospectives and they would read neither. The close is the
trigger. When metrics.md shows this month's close, run this — the founder
invokes it, or the Chief of Staff does on the back of the close landing.
Mechanically: the close leaves Proposed: write the monthly review for <YYYY-MM> in metrics.md ## Close, and the next daily-brief drains it
into the queue. That line is this skill's alarm clock; if it was refused, the
refusal is in that morning's brief with a reason, which is more than a silent
never-ran leaves behind.
Inputs
Read first, in order — house rule 1:
charter.md— what this business claims to bemetrics.md— the close, and its dategoals.md— the quarter's bets, at month two of threereviews/weekly/— the four weeks: where the hours actually wentqueue.md## Done— the month's closed work, with what each item emitted. A monthly retrospective that cannot see what was finished is reviewing the plan rather than the month.## Doneis deleted at 30 days on the grounds that this review andweekly-reviewhave both read it by then — so read it, or that deletion is resting on a contract nobody made.decisions/— everything logged this monthreviews/monthly/— last month's correction: did it hold?
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.
- 10d ago First seen · 137 lines · 25 tokens per session scan A 1a3ce7e51eda
monthly-review is a skill published in the GitHub repository msolecki/founder-os (4 stars, last pushed 7d ago), licensed MIT. It adds 25 tokens to every session and 1,603 once invoked, about $0.0001 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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