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 delivery-retrogit 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/delivery-retro)<a href="https://agentmods.dev/skills/msolecki/founder-os/delivery-retro"><img src="https://agentmods.dev/badge/skills/msolecki/founder-os/delivery-retro/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/delivery-retro"><img src="https://agentmods.dev/badge/skills/msolecki/founder-os/delivery-retro.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 | $0.00027 | $0.01631 |
| Opus 5 | $0.00014 | $0.00816 |
| Sonnet 5 | $0.00005 | $0.00326 |
| Haiku 4.5 | $0.00003 | $0.00163 |
Grade A, and why
delivery-retro 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 9d 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 — 132 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Delivery Retro
Every rate the founder charges is downstream of an estimate they made once and never checked. This is where the checking happens. It is also the only skill in this company that reliably changes the price, which is why it gets skipped.
When to use
Within five days of shipping. After five days the founder remembers a story about the project, and the story is always kinder than the timesheet. Also at any milestone that ran more than a week over.
Inputs
Read first, in order — house rule 1:
clients/<client>.md— the estimate, the scope log, the absorbed askspipeline.md— the proposal: what was quoted, in hours and in moneymetrics.md— the target effective rate to measure against
Beliefs
- The overrun is never in the phase the founder remembers. Memory keeps the phase that was stressful; the timesheet keeps the phase that was long, and they are reliably different phases. When the file and the recollection disagree, the file is the project.
- A project delivered on time by working the weekend is an overrun. It settled the bill in a currency nobody logged. "We shipped it" is not a variance, and a retro that accepts it as one is how a phase stays mispriced for three consecutive projects.
- An estimate is a claim about the founder, not about the work. Two people quoting this project honestly produce different correct numbers. So "the estimate was too low" is usually false and "I was not yet the person that estimate described" is usually true — and only one of those has a fix that isn't a price rise.
- Revision rounds diagnose the brief, not the client's taste. Three rounds means the client was not shown the thing early enough to be cheaply wrong about it. The fix is upstream in what was agreed, never downstream in more polish.
Steps
- Recover the actual hours, including the ones nobody billed. The estimate covered delivery. The actual includes sales calls before the deal, scoping, revisions, the "quick calls", the Slack answered on a Sunday, and the invoice chase. Leave those out and the retro proves the estimate was fine — which is exactly how the rate stays broken for another year.
- Compute variance per phase, not per project. "20% over" is unactionable. "Discovery on target, build 15% over, revisions 210% over" names the thing to fix and prices it.
- Answer the one question that matters: scope, estimating, or unfamiliarity?
These have three different owners, and confusing them is precisely why the
same overrun repeats. Pick one — the dominant cause of the worst phase, not a
blend. A retro that says "a bit of both" routes to nobody.
- Scope → the work grew and nobody charged for it. That is a
scope-guardfailure and it belongs to the Delivery Lead. Fix the boundary, not the estimate. - Estimating → the work was correctly bounded, the founder had done this
kind of work before, and it still took longer than quoted. Then
offer.mdis mispriced, and that is the Positioning Advisor's file. - Unfamiliarity → the work was correctly bounded and the estimate was fair
for someone who had done it before. The founder had not. That is a
capability gap, it belongs to the Skills Mentor, and
skill-gapreads this exact field to find it.
- Scope → the work grew and nobody charged for it. That is a
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.
- 9d ago First seen · 132 lines · 27 tokens per session scan A 233f6786186b
delivery-retro is a skill published in the GitHub repository msolecki/founder-os (4 stars, last pushed 6d ago), licensed MIT. It adds 27 tokens to every session and 1,631 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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