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 avelikiy/great_cto --skill opportunity-solution-treegit clone --depth 1 https://github.com/avelikiy/great_ctoWrote 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/avelikiy/great_cto/opportunity-solution-tree)<a href="https://agentmods.dev/skills/avelikiy/great_cto/opportunity-solution-tree"><img src="https://agentmods.dev/badge/skills/avelikiy/great_cto/opportunity-solution-tree/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/avelikiy/great_cto/opportunity-solution-tree"><img src="https://agentmods.dev/badge/skills/avelikiy/great_cto/opportunity-solution-tree.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 | $0.00071 | $0.01863 |
| Opus 5.5 | $0.00028 | $0.00745 |
| Sonnet 5.5 | $0.00014 | $0.00373 |
| Haiku 4.5 | $0.00007 | $0.00186 |
Grade A, and why
opportunity-solution-tree 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 27d 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 — 182 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Opportunity Solution Tree (OST)
Structures product discovery by connecting a desired outcome → customer opportunities → solutions → experiments. Prevents jumping to solutions before validating the problem space.
Based on Teresa Torres, Continuous Discovery Habits (2021).
The 4-level structure
┌─────────────────────┐
│ DESIRED OUTCOME │ ← single measurable metric
└──────────┬──────────┘
┌───────────────┼────────────────┐
┌──────┴─────┐ ┌──────┴─────┐ ┌──────┴─────┐
│Opportunity │ │Opportunity │ │Opportunity │ ← customer pain/need
│ A │ │ B │ │ C │
└──────┬─────┘ └──────┬─────┘ └────────────┘
┌──────┴───┐ ┌──────┴───┐
┌───┴──┐ ┌───┴──┐ ┌───┴──┐ ┌───┴──┐
│Sol 1 │ │Sol 2 │ │Sol 3 │ │Sol 4 │ ← possible solutions
└───┬──┘ └──────┘ └───┬──┘ └──────┘
┌────┴────┐ ┌───┴────┐
│ Exp 1 │ │ Exp 2 │ ← fast experiments
└─────────┘ └────────┘
Key principles:
- One desired outcome at a time — don't try to solve everything
- Opportunities are customer problems/needs, never solutions
- Generate ≥3 solutions per opportunity before choosing one
- Experiments are the cheapest way to validate an assumption
- The tree is a living document — update weekly as you learn
How to build an OST
Step 1 — Define the desired outcome
Confirm or help the user articulate one measurable outcome at the top of the tree.
Good outcomes:
- "Increase 7-day retention from 20% to 35%"
- "Reduce time-to-first-value from 3 days to 1 day"
- "Increase conversion from free to paid from 2% to 5%"
Bad outcomes (reject these):
- "Build a better onboarding" — that's a solution
- "Improve the product" — unmeasurable
- "Launch feature X" — that's an output
If the user can't state a metric: ask "What would need to be true for you to consider this effort a success?"
Step 2 — Map opportunities from research
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.
- 27d ago Changed 20ef8c87621d
- 1mo ago First seen · 182 lines · 71 tokens per session scan A e6c62c61d5df
opportunity-solution-tree is a skill published in the GitHub repository avelikiy/great_cto (105 stars, last pushed yesterday), licensed MIT. It adds 71 tokens to every session and 1,863 once invoked, about $0.0003 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 2026-09-03.
Other skills, from other repositories
pm
Project manager for GitHub issues: brainstorm design approaches, create structured issues optimized for LLM agent teams, triage and recommend what to work on next, audit and clean up stale issues, or deep-validate a single issue against the codebase. Triggers: create issue, plan work, new task, project manager, write…
pocket-closing
Close a reviewed Pocket phase or plan when the user explicitly requests closeout, including as part of an end-to-end request. Reconcile verdicts with log.json, advance only a passing phase, append a readable per-phase closeout, and finalize the plan when all phases are done. A passing verdict alone does not authorize…
pm-tech-spec-review
Review an engineering technical spec through a PM lens — does it cover every PRD requirement, does it preserve user/UX intent, does it quietly add or drop scope, what are the product risks, what's missing for launch. Produces a priority-tagged findings list + clarifying questions for engineering. Use after eng drafts…
tpp-orchestrate
Work through a queue of Technical Project Plans serially — delegate each to a TDD subagent, get a cross-model second opinion, empirically vet every finding, and make one coherent commit per plan. Use when executing a documented plan queue such as todo/ or feat-name/ for a port, migration, or multi-stage feature.
tpp
Work a Technical Project Plan to completion — read the plan, start from its current phase, work through its tasks until their acceptance tests pass, and update the plan as each task lands. Use when starting or resuming multi-session work tracked in a plan file.
handoff
Update the active Technical Project Plan for handoff when context is running low or the session is ending, so the next session continues instead of restarting.