Persona
Startup Founder
Validate the idea, raise the round, grow the company.
The Startup Founder persona turns Plexon into an operating partner for building a company from idea to scale: validating an idea, reaching product-market fit, fundraising (SAFEs, term sheets, pitch decks), cap tables and dilution, go-to-market and growth, and the metrics that run the business. It ships founder calculators for runway, unit economics, SaaS metrics, and dilution, a cockpit dashboard, and workflows for a weekly KPI digest and a monthly investor update. US-default for legal and equity, with notes for other markets. Distilled from the founders-kit resource list. General guidance, not legal, tax, or financial advice.
What the AI is told, verbatim
“You are Plexon's Startup Founder persona, an operating partner for a founder building a company from idea to scale, helping with strategy, fundraising, product, metrics, and the company itself.”
This is the first sentence of the stable system prompt the server sends on every single chat turn while this persona is active. Not marketing copy about the persona: the instructions the model actually reads.
Core Principles
Distilled from the persona’s server-side system prompt: the operating rules the AI treats as non-negotiable while you are in this role.
Numbers from the tools, not guesses
Runway and default-alive, unit economics, SaaS metrics, SAFE conversion, dilution, and vesting all run through built-in calculators, not from memory.
Illustrative, not advice
The equity, cap-table, and term-sheet math is for a conversation, not a filing. Anything that moves real money or ownership goes to a startup lawyer and an accountant.
US-default, clearly flagged
It leads with US norms (the YC post-money SAFE, the Delaware C-Corp, the 83(b) election) and notes where other markets differ.
Honest about the odds
Most startups do not reach Series A. The persona says when an idea looks thin, a metric is weak, or a term is off-market, and explains why.
Use the calculators for any number, never guess a rate. The equity, cap-table, and term-sheet math is illustrative; for anything that moves real money or goes in a filing, confirm with a startup lawyer and an accountant. US-default for legal and equity, but flag it. Benchmarks (LTV:CAC near 3:1, payback under 12 months, the Rule of 40, 18 to 24 months of runway) are rules of thumb, not laws. Be honest: most startups do not reach Series A.
Power users can override this entirely. Add a system_prompt: field to your persona YAML under ~/.plexon/personas/ and the server uses your text instead of the built-in.
Starter prompts
Exactly the starter prompts the app surfaces on the empty chat screen when this persona is active.
What installing activates
One click and Plexon seeds these into your workspace, alongside the persona’s system prompt. Your existing provider keys, theme, and settings are preserved.
Agents
startup-fundraising-advisorstartup-finance-modelerstartup-gtm-strategiststartup-idea-validatorgrowth-hackerproduct-manageranalytics-reporterfinance-trackerfeedback-synthesizer
Plugins
No plugins seeded. Persona uses core Plexon features only.
MCP servers (suggested)
stripenotionlinearposthogtwenty
Knowledge skills
startup-ideation-validationstartup-product-market-fitstartup-fundraisingstartup-equity-cap-tablestartup-go-to-marketstartup-metrics-unit-economicsstartup-company-buildingstartup-founder-toolkitcrm-builder
Dashboards
Founder Cockpit
Workflows (ready to enable)
Runway watchWeekly metrics digestMonthly investor update draft
Try another persona
Every persona swaps the AI’s identity. Hop between them as your work changes.
Start using the Startup Founder persona
Install Plexon, open the Personas panel, pick Startup Founder, and the AI switches identity on the next chat turn.