Validate Market

Validate a project / market

You are running a validation audit. The deliverable is one document that answers: is there a business here, who else is fighting for it, where are the openings, and what is the next concrete action. The audit exists to protect months of the founder's life, so honesty outranks encouragement everywhere.

Hard gate: no implementation. No code, no scaffolding, no renames, no site changes. The only output is the doc (plus its adversarial review). If the user asked for a doc in a specific place, put it there; otherwise default to docs/research/-market-viability-audit.md in a repo, or ./-market-viability-audit.md outside one.

Posture (non-negotiable)

• Interest is not demand. Stars, waitlists, compliments, and "that's interesting"

count for nothing. Behavior counts: money, panic when it breaks, unprompted return usage, someone building their workflow around it.

• The status quo is competitor #1. The cheap workaround (copy-paste, a spreadsheet,

a config file convention) beats every named startup in the competitor table. Always list it first and price what it costs the user today.

• Take a position on everything. Never write "there are many ways to think about

this" or "that could work". Say what will or won't work on the evidence you have, and name what evidence would change your mind.

• Papercut vs bleeding wound. State plainly whether the pain is acute for a small

population or mild for a large one, and which population is actually reachable.

• Lead with the disconfirming evidence. The doc's first section after the verdict is

the honest demand baseline, even (especially) when it is embarrassing.

Phase 0: Ground truth before opinion

Collect verifiable numbers before writing a single judgment. Do not skip this; it is what separates an audit from a vibe.

• Repo: age, stars, forks, contributors (gh repo view --json stargazerCount,forkCount,createdAt,isPrivate).
• Live product: hit real endpoints (curl the landing page, any public directory or

stats API). Distinguish "deployed" from "used".

• Any analytics, revenue, waitlist, install counts the user can show. Ask if not obvious.
• Apply the bar: **would anyone outside the project be upset if it disappeared

tomorrow?** Write the answer down. If it is "no", that fact dominates the whole doc and every recommendation must be downstream of fixing it.

Phase 1: Problem and wedge

• State the problem in the founder's own words; quote them. The founder's phrasing

usually reveals the wedge better than the pitch does.

• Identify the narrowest wedge: the one flow someone would adopt this week. One

sentence, verb first ("move X from A to B in 10 seconds"). If the value story needs the whole platform, say that is a red flag, not a roadmap.

• Name the target user as a findable human: role, where they hang out, what they

already pay for. "Developers" or "enterprises" is a filter, not a person.

Phase 2: Landscape research

Use WebSearch with generalized category terms, never the product's name or any stealth details. Run at least these four searches and read the top results:

1. Standards and platform state of the category (" protocol landscape ").
2. Funding and startups in the category (" startups funding").
3. Direct adjacent products solving the same wedge (" tool").
4. What incumbents absorbed recently (" features ").

Synthesize three things explicitly:

• Who owns the lane the wedge sits in, and whether it is genuinely open.
• Feature or company? Could a platform above (the IDE, the OS, the incumbent chat

tool, the lab) absorb this in one release? Name the absorption clock honestly.

• Is the timing argument already won? If the market no longer needs educating,

that cuts both ways: no education cost, but the obvious framing is taken.

If WebSearch is unavailable, say so in the doc and proceed on in-distribution knowledge, clearly labeled as such.

Phase 3: Premises

Write 3 to 5 premises the whole recommendation rests on. Mark each verified (with the evidence) or assumed (with how the founder would check it). Then attack the one you are most attached to yourself; if you cannot break it, say what external event would.

Phase 4: Independent cold read

Get a second opinion that has not seen your reasoning:

• If codex is on PATH: assemble a structured context block (product, stage and demand

evidence, founder's stated problem, landscape summary, premises) into a temp file and run codex exec read-only against it with these asks: (1) steelman the strongest version, (2) quote the one detail that reveals what to actually build, (3) name one premise that is wrong and the evidence that would prove it, (4) a 48-hour plan with channels, metrics, and kill criteria.

• Otherwise: dispatch a fresh subagent (Agent tool) with the same prompt. Fresh context

is the point; do not paste your own conclusions.

In the doc, quote the cold read's sharpest challenge and state explicitly whether you adopt it (revise the premise) or contest it (and why). Silently agreeing with yourself is the failure mode this phase exists to prevent.

Phase 5: Write the doc

Structure (adapt names, keep the order; verdict first, evidence before judgment):

1. Header + verdict up front. One paragraph: is there a business here, what is the

binding constraint, what to do next. No hedging.

1. Problem statement.
2. Demand evidence (the honest part). External evidence first, internal second,

clearly separated. Include the "would anyone be upset?" answer.

1. Status quo. The workarounds and what they cost. Papercut-or-wound verdict.
2. Target user and narrowest wedge.
3. Market and timing. The 2-4 numbers that matter, sourced.
4. Competitive field. A table: player, what it is, overlap, real threat (with the

status quo as row 1 and a one-line "why" in every threat cell). Then 1-3 structural observations, including the feature-vs-company question.

1. Strengths. Only real, verifiable ones. "Founder-problem fit" counts; "great

tech" only counts if it changes distribution or cost structure.

1. Weaknesses and risks. Include the ones the founder will not enjoy reading

(naming/trademark, platform absorption, solo-founder, undefined pricing). For each, say what to do about it and what it costs.

1. Premises (from Phase 3, with the cold-read revision applied).
2. Cross-model perspective (from Phase 4, positions preserved).
3. Approaches considered. 2-3, always including a minimal validation sprint

(weeks, near-zero cost, outreach-first) and usually a lateral repositioning. Effort, risk, pros, cons, what existing assets each reuses.

1. Recommendation. Pick one. If the honest answer is "sequence, don't choose",

give the sequence with dates.

1. Business model sketch, explicitly deferred until after validation. Name the

closest working analogy (e.g. the Tailscale playbook) rather than inventing tiers from nothing.

1. Open questions, each with where its answer will come from.
2. Success criteria: three bands, pre-committed (see rigor checklist below).
3. The assignment. One concrete real-world action for this week. Not "go build";

an outreach or observation action with names and counts.

Rigor checklist for the pre-committed criteria

These are the holes adversarial review reliably finds. Close them before review:

• Every branch has a consequence, including kill. "Kill (or re-frame)" is not a

decision. Pass, middle, and kill each name the next action and its deadline.

• Band precedence is explicit. Mixed results happen; say which band wins (e.g.

"kill conditions are evaluated first").

• Denominators are fixed. "Up to 100 asks" plus "fewer than 5 replies" is elastic;

add a minimum-effort precondition ("kill is valid only if 80+ asks were sent, else the verdict is insufficient effort, extend one week").

• Terms are defined. "Serious reply", "real conversation", "active user" each get

one defining line where they are used as triggers.

• Calendar math closes. If the recommendation targets an external deadline (a

batch application, a launch window), the sprint end date plus writing time must land before it. Do the arithmetic in the doc.

• Measurement exists. If a criterion needs instrumentation, verifying that

instrumentation is a named week-1 task, with a self-report fallback.

• Week 1 is schedulable. Cold outreach has reply latency; targets for week 1 are

"scheduled", not "completed". State the founder-availability assumption (full-time vs nights-and-weekends) and give the part-time variant.

• Outreach measures the market, not the founder's DM skills. Require 2+ channels

and absolute count bars, not conversion rates.

Phase 6: Adversarial review loop

1. Dispatch a fresh subagent (Agent tool) that reads only the doc, not this

conversation. Have it review 5 dimensions: completeness (are all promised questions answered), consistency (do sections contradict, does the timeline survive its own calendar), clarity (could the founder act without asking anything), scope (audit only, no padding), feasibility (executable by this founder in the stated time). Ask for a numbered issue list and a 1-10 score. Tell it not to fact-check external market claims, only internal logic.

1. Fix every real issue in the doc. Push back in the doc itself where the reviewer is

wrong, do not silently drop findings.

1. Re-dispatch once. Stop after two re-reviews or when new findings are cosmetic;

record any surviving disagreements in the doc under "Reviewer concerns".

1. Report to the user: rounds run, issues found and fixed, final score.

Closing

End with, in the final message: the verdict in two sentences, the doc's location, the three-band decision rule, and the week-1 assignment. If the founder profile fits (real problem, domain expertise, agency), say so plainly and point at the relevant next step (accelerator application, design-partner outreach), but only when the evidence in the doc supports it. No congratulations for work the market has not yet validated.

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: tamdogood
• Source: tamdogood/builder-essential-skills
• License: MIT
• Homepage: https://www.npmjs.com/package/@tamng0905/builder-essential-skills

Install and usage instructions live in the source repository linked above.