OpenSpec | Y Combinator
Plan mode for complex features; YC W26.
Weak funding evidence: mention does not include a parsed raise amount/round and may refer to non-funding context.
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Evidence-bound summary — expand sections for movement, risks, and signals.
Memo snapshot · May 20, 2026, 6:30 PM
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TL;DR
Seed (YC)OpenSpec — A lightweight spec-driven framework Spec-driven development for AI coding assistants.
Stage: Seed (YC) — specific raise amount not disclosed in indexed public sources.
Funding
MediumStage: Seed (YC) — specific raise amount not disclosed in indexed public sources.
Hiring
3 hiring‑related row(s); role‑spam risk if mostly generic boards (High).
Product / news
5 product/news‑styled row(s); headline risk without filings (High).
Verified facts
+3 more in Recent movement below
Plan mode for complex features; YC W26.
Weak funding evidence: mention does not include a parsed raise amount/round and may refer to non-funding context.
No open roles indexed yet.
The index price and activity score are algorithmic estimates based on observed public company-level signals. They may be incomplete, stale, or inaccurate and are not investment, legal, tax, or business advice.
OpenSpec:reddit_credentials_not_configured
Signal timeline
45 dated public signals · newest on the right
Latest momentum signal per category. Expand a card to inspect raw payloads.
Source types found
Strongest / recent news-style rows
About page · Thu, Jul 2, 04:16 PM · confidence 90%high quality
Wed, May 20, 06:30 PM · confidence 85%high quality
About / company · Mon, May 11, 05:14 AM · confidence 90%high quality
Newest first · 45 event(s)
Source: Blog
OpenSpec is a lightweight, spec‑driven framework for coding agents and CLIs — universal, open source, and no API keys or MCP required.
Source: Careers page
OpenSpec is a lightweight, spec‑driven framework for coding agents and CLIs — universal, open source, and no API keys or MCP required.
Source: About page
OpenSpec is a lightweight, spec‑driven framework for coding agents and CLIs — universal, open source, and no API keys or MCP required.
Source: official_site
OpenSpec — A lightweight spec‑driven framework A lightweight spec-driven framework Universal Open Source No API Keys No MCP Get Started npm install -g @fission-ai/openspec@latest GitHub https://github.com/Fission-AI/OpenSpec/ Discord https://discord.gg/YctCnv…
Source: official_site
OpenSpec — A lightweight spec‑driven framework A lightweight spec-driven framework Universal Open Source No API Keys No MCP Get Started npm install -g @fission-ai/openspec@latest GitHub https://github.com/Fission-AI/OpenSpec/ Discord https://discord.gg/YctCnv…
Source: official_site
OpenSpec — A lightweight spec‑driven framework A lightweight spec-driven framework Universal Open Source No API Keys No MCP Get Started npm install -g @fission-ai/openspec@latest GitHub https://github.com/Fission-AI/OpenSpec/ Discord https://discord.gg/YctCnv…
Source: official_site
OpenSpec — A lightweight spec‑driven framework A lightweight spec-driven framework Universal Open Source No API Keys No MCP Get Started npm install -g @fission-ai/openspec@latest GitHub https://github.com/Fission-AI/OpenSpec/ Discord https://discord.gg/YctCnv…
Source: official_site
OpenSpec — A lightweight spec‑driven framework A lightweight spec-driven framework Universal Open Source No API Keys No MCP Get Started npm install -g @fission-ai/openspec@latest GitHub https://github.com/Fission-AI/OpenSpec/ Discord https://discord.gg/YctCnv…
Source: official_site
OpenSpec — A lightweight spec‑driven framework A lightweight spec-driven framework Universal Open Source No API Keys No MCP Get Started npm install -g @fission-ai/openspec@latest GitHub https://github.com/Fission-AI/OpenSpec/ Discord https://discord.gg/YctCnv…
Source: official_site
OpenSpec — A lightweight spec‑driven framework A lightweight spec-driven framework Universal Open Source No API Keys No MCP Get Started npm install -g @fission-ai/openspec@latest GitHub https://github.com/Fission-AI/OpenSpec/ Discord https://discord.gg/YctCnv…
Source: official_site
OpenSpec — A lightweight spec‑driven framework A lightweight spec-driven framework Universal Open Source No API Keys No MCP Get Started npm install -g @fission-ai/openspec@latest GitHub https://github.com/Fission-AI/OpenSpec/ Discord https://discord.gg/YctCnv…
Source: official_site
OpenSpec — A lightweight spec‑driven framework A lightweight spec-driven framework Universal Open Source No API Keys No MCP Get Started npm install -g @fission-ai/openspec@latest GitHub https://github.com/Fission-AI/OpenSpec/ Discord https://discord.gg/YctCnv…
Source: official_site
OpenSpec — A lightweight spec‑driven framework A lightweight spec-driven framework Universal Open Source No API Keys No MCP Get Started npm install -g @fission-ai/openspec@latest GitHub https://github.com/Fission-AI/OpenSpec/ Discord https://discord.gg/YctCnv…
Source: official_site
OpenSpec — A lightweight spec‑driven framework A lightweight spec-driven framework Universal Open Source No API Keys No MCP Get Started npm install -g @fission-ai/openspec@latest GitHub https://github.com/Fission-AI/OpenSpec/ Discord https://discord.gg/YctCnv…
Source: official_site
OpenSpec — A lightweight spec‑driven framework A lightweight spec-driven framework Universal Open Source No API Keys No MCP Get Started npm install -g @fission-ai/openspec@latest GitHub https://github.com/Fission-AI/OpenSpec/ Discord https://discord.gg/YctCnv…
Source: official_site
OpenSpec — A lightweight spec‑driven framework A lightweight spec-driven framework Universal Open Source No API Keys No MCP Get Started npm install -g @fission-ai/openspec@latest GitHub https://github.com/Fission-AI/OpenSpec/ Discord https://discord.gg/YctCnv…
Source: official_site
OpenSpec — A lightweight spec‑driven framework A lightweight spec-driven framework Universal Open Source No API Keys No MCP Get Started npm install -g @fission-ai/openspec@latest GitHub https://github.com/Fission-AI/OpenSpec/ Discord https://discord.gg/YctCnv…
Source: official_site
OpenSpec — A lightweight spec‑driven framework A lightweight spec-driven framework Universal Open Source No API Keys No MCP Get Started npm install -g @fission-ai/openspec@latest GitHub https://github.com/Fission-AI/OpenSpec/ Discord https://discord.gg/YctCnv…
Spec-driven development for AI coding assistants.
Plan mode for complex features; YC W26.
Source: Blog / news
OpenSpec is a lightweight, spec‑driven framework for coding agents and CLIs — universal, open source, and no API keys or MCP required.
Source: Blog / news
OpenSpec is a lightweight, spec‑driven framework for coding agents and CLIs — universal, open source, and no API keys or MCP required.
Source: Careers
OpenSpec is a lightweight, spec‑driven framework for coding agents and CLIs — universal, open source, and no API keys or MCP required.
Source: About / company
OpenSpec is a lightweight, spec‑driven framework for coding agents and CLIs — universal, open source, and no API keys or MCP required.
Source: Customers
OpenSpec is a lightweight, spec‑driven framework for coding agents and CLIs — universal, open source, and no API keys or MCP required.
Source: Pricing
OpenSpec is a lightweight, spec‑driven framework for coding agents and CLIs — universal, open source, and no API keys or MCP required.
Source: Press
OpenSpec is a lightweight, spec‑driven framework for coding agents and CLIs — universal, open source, and no API keys or MCP required.
Source: News
OpenSpec is a lightweight, spec‑driven framework for coding agents and CLIs — universal, open source, and no API keys or MCP required.
Source: Jobs page
OpenSpec is a lightweight, spec‑driven framework for coding agents and CLIs — universal, open source, and no API keys or MCP required.
Source: Team page
OpenSpec is a lightweight, spec‑driven framework for coding agents and CLIs — universal, open source, and no API keys or MCP required.
Source: npm_registry
Versioned npm distribution for the OpenSpec Buddy agent skills.
Source: npm_registry
OpenSpec issue-mode extensions packaged for npm-first distribution.
Source: npm_registry
An OpenCode plugin that integrates OpenSpec, providing a dedicated agent for planning and specifying software architecture.
Source: npm_registry
OpenSpec + Playwright E2E verification setup tool for Claude Code
Source: npm_registry
OpenSpec 脚手架 — 一键初始化 AI 辅助开发工作流
Source: hackernews
Source: hackernews
Source: hackernews
Source: hackernews
Source: hackernews
Source: hackernews
Source: hackernews
Open-source spec framework with 20k+ stars.
16 row(s)
The company's own site — the authoritative description of what they sell and to whom. Marketing-controlled, so treat claims as positioning rather than verified traction.
OpenSpec — A lightweight spec‑driven framework A lightweight spec-driven framework Universal Open Source No API Keys No MCP Get Started npm install -g @fission-ai/openspec@latest GitHub https://github.com/Fission-AI/OpenSpec/ Discord https://discord.gg/YctCnv…
Why it matters: Primary source — the company's own positioning; best read for what they sell and to whom, not for traction claims.
Open source ↗OpenSpec — A lightweight spec‑driven framework A lightweight spec-driven framework Universal Open Source No API Keys No MCP Get Started npm install -g @fission-ai/openspec@latest GitHub https://github.com/Fission-AI/OpenSpec/ Discord https://discord.gg/YctCnv…
Why it matters: Primary source — the company's own positioning; best read for what they sell and to whom, not for traction claims.
Open source ↗OpenSpec — A lightweight spec‑driven framework A lightweight spec-driven framework Universal Open Source No API Keys No MCP Get Started npm install -g @fission-ai/openspec@latest GitHub https://github.com/Fission-AI/OpenSpec/ Discord https://discord.gg/YctCnv…
Why it matters: Primary source — the company's own positioning; best read for what they sell and to whom, not for traction claims.
Open source ↗OpenSpec — A lightweight spec‑driven framework A lightweight spec-driven framework Universal Open Source No API Keys No MCP Get Started npm install -g @fission-ai/openspec@latest GitHub https://github.com/Fission-AI/OpenSpec/ Discord https://discord.gg/YctCnv…
Why it matters: Primary source — the company's own positioning; best read for what they sell and to whom, not for traction claims.
Open source ↗OpenSpec — A lightweight spec‑driven framework A lightweight spec-driven framework Universal Open Source No API Keys No MCP Get Started npm install -g @fission-ai/openspec@latest GitHub https://github.com/Fission-AI/OpenSpec/ Discord https://discord.gg/YctCnv…
Why it matters: Primary source — the company's own positioning; best read for what they sell and to whom, not for traction claims.
Open source ↗OpenSpec — A lightweight spec‑driven framework A lightweight spec-driven framework Universal Open Source No API Keys No MCP Get Started npm install -g @fission-ai/openspec@latest GitHub https://github.com/Fission-AI/OpenSpec/ Discord https://discord.gg/YctCnv…
Why it matters: Primary source — the company's own positioning; best read for what they sell and to whom, not for traction claims.
Open source ↗OpenSpec — A lightweight spec‑driven framework A lightweight spec-driven framework Universal Open Source No API Keys No MCP Get Started npm install -g @fission-ai/openspec@latest GitHub https://github.com/Fission-AI/OpenSpec/ Discord https://discord.gg/YctCnv…
Why it matters: Primary source — the company's own positioning; best read for what they sell and to whom, not for traction claims.
Open source ↗OpenSpec — A lightweight spec‑driven framework A lightweight spec-driven framework Universal Open Source No API Keys No MCP Get Started npm install -g @fission-ai/openspec@latest GitHub https://github.com/Fission-AI/OpenSpec/ Discord https://discord.gg/YctCnv…
Why it matters: Primary source — the company's own positioning; best read for what they sell and to whom, not for traction claims.
Open source ↗OpenSpec — A lightweight spec‑driven framework A lightweight spec-driven framework Universal Open Source No API Keys No MCP Get Started npm install -g @fission-ai/openspec@latest GitHub https://github.com/Fission-AI/OpenSpec/ Discord https://discord.gg/YctCnv…
Why it matters: Primary source — the company's own positioning; best read for what they sell and to whom, not for traction claims.
Open source ↗OpenSpec — A lightweight spec‑driven framework A lightweight spec-driven framework Universal Open Source No API Keys No MCP Get Started npm install -g @fission-ai/openspec@latest GitHub https://github.com/Fission-AI/OpenSpec/ Discord https://discord.gg/YctCnv…
Why it matters: Primary source — the company's own positioning; best read for what they sell and to whom, not for traction claims.
Open source ↗OpenSpec — A lightweight spec‑driven framework A lightweight spec-driven framework Universal Open Source No API Keys No MCP Get Started npm install -g @fission-ai/openspec@latest GitHub https://github.com/Fission-AI/OpenSpec/ Discord https://discord.gg/YctCnv…
Why it matters: Primary source — the company's own positioning; best read for what they sell and to whom, not for traction claims.
Open source ↗OpenSpec — A lightweight spec‑driven framework A lightweight spec-driven framework Universal Open Source No API Keys No MCP Get Started npm install -g @fission-ai/openspec@latest GitHub https://github.com/Fission-AI/OpenSpec/ Discord https://discord.gg/YctCnv…
Why it matters: Primary source — the company's own positioning; best read for what they sell and to whom, not for traction claims.
Open source ↗OpenSpec — A lightweight spec‑driven framework A lightweight spec-driven framework Universal Open Source No API Keys No MCP Get Started npm install -g @fission-ai/openspec@latest GitHub https://github.com/Fission-AI/OpenSpec/ Discord https://discord.gg/YctCnv…
Why it matters: Primary source — the company's own positioning; best read for what they sell and to whom, not for traction claims.
Open source ↗OpenSpec — A lightweight spec‑driven framework A lightweight spec-driven framework Universal Open Source No API Keys No MCP Get Started npm install -g @fission-ai/openspec@latest GitHub https://github.com/Fission-AI/OpenSpec/ Discord https://discord.gg/YctCnv…
Why it matters: Primary source — the company's own positioning; best read for what they sell and to whom, not for traction claims.
Open source ↗OpenSpec — A lightweight spec‑driven framework A lightweight spec-driven framework Universal Open Source No API Keys No MCP Get Started npm install -g @fission-ai/openspec@latest GitHub https://github.com/Fission-AI/OpenSpec/ Discord https://discord.gg/YctCnv…
Why it matters: Primary source — the company's own positioning; best read for what they sell and to whom, not for traction claims.
Open source ↗Spec-driven development for AI coding assistants.
Why it matters: Primary source — the company's own positioning; best read for what they sell and to whom, not for traction claims.
Open source ↗9 row(s)
Third-party press coverage. Independent reporting corroborates company claims; repeated coverage across outlets is a momentum signal.
OpenSpec is a lightweight, spec‑driven framework for coding agents and CLIs — universal, open source, and no API keys or MCP required.
Why it matters: Independent coverage — third-party corroboration of company claims; recurring coverage indicates rising visibility.
Open source ↗OpenSpec is a lightweight, spec‑driven framework for coding agents and CLIs — universal, open source, and no API keys or MCP required.
Why it matters: Independent coverage — third-party corroboration of company claims; recurring coverage indicates rising visibility.
Open source ↗OpenSpec is a lightweight, spec‑driven framework for coding agents and CLIs — universal, open source, and no API keys or MCP required.
Why it matters: Independent coverage — third-party corroboration of company claims; recurring coverage indicates rising visibility.
Open source ↗OpenSpec is a lightweight, spec‑driven framework for coding agents and CLIs — universal, open source, and no API keys or MCP required.
Why it matters: Independent coverage — third-party corroboration of company claims; recurring coverage indicates rising visibility.
Open source ↗OpenSpec is a lightweight, spec‑driven framework for coding agents and CLIs — universal, open source, and no API keys or MCP required.
Why it matters: Independent coverage — third-party corroboration of company claims; recurring coverage indicates rising visibility.
Open source ↗OpenSpec is a lightweight, spec‑driven framework for coding agents and CLIs — universal, open source, and no API keys or MCP required.
Why it matters: Independent coverage — third-party corroboration of company claims; recurring coverage indicates rising visibility.
Open source ↗OpenSpec is a lightweight, spec‑driven framework for coding agents and CLIs — universal, open source, and no API keys or MCP required.
Why it matters: Independent coverage — third-party corroboration of company claims; recurring coverage indicates rising visibility.
Open source ↗Why it matters: Independent coverage — third-party corroboration of company claims; recurring coverage indicates rising visibility.
Open source ↗Why it matters: Independent coverage — third-party corroboration of company claims; recurring coverage indicates rising visibility.
Open source ↗1 row(s)
Funding announcements and investor-database records. The strongest public signal of capitalization: round, amount, and syndicate quality when disclosed.
Plan mode for complex features; YC W26.
Why it matters: Funding signal — capitalization evidence; check the linked source for round, amount, and investors.
Open source ↗3 row(s)
Open roles and careers pages. Active hiring implies runway to spend and shows where the company is investing (engineering vs GTM vs ops).
OpenSpec is a lightweight, spec‑driven framework for coding agents and CLIs — universal, open source, and no API keys or MCP required.
Why it matters: Hiring signal — open roles imply runway to spend and show where the company is investing.
Open source ↗OpenSpec is a lightweight, spec‑driven framework for coding agents and CLIs — universal, open source, and no API keys or MCP required.
Why it matters: Hiring signal — open roles imply runway to spend and show where the company is investing.
Open source ↗OpenSpec is a lightweight, spec‑driven framework for coding agents and CLIs — universal, open source, and no API keys or MCP required.
Why it matters: Hiring signal — open roles imply runway to spend and show where the company is investing.
Open source ↗9 row(s)
Public engineering activity. Sustained commits, releases, and stars indicate real product development and, for dev tools, developer adoption.
Versioned npm distribution for the OpenSpec Buddy agent skills.
Why it matters: Engineering signal — public repo activity evidences active development and possible developer adoption.
Open source ↗OpenSpec issue-mode extensions packaged for npm-first distribution.
Why it matters: Engineering signal — public repo activity evidences active development and possible developer adoption.
Open source ↗An OpenCode plugin that integrates OpenSpec, providing a dedicated agent for planning and specifying software architecture.
Why it matters: Engineering signal — public repo activity evidences active development and possible developer adoption.
Open source ↗OpenSpec + Playwright E2E verification setup tool for Claude Code
Why it matters: Engineering signal — public repo activity evidences active development and possible developer adoption.
Open source ↗OpenSpec 脚手架 — 一键初始化 AI 辅助开发工作流
Why it matters: Engineering signal — public repo activity evidences active development and possible developer adoption.
Open source ↗Why it matters: Engineering signal — public repo activity evidences active development and possible developer adoption.
Open source ↗Why it matters: Engineering signal — public repo activity evidences active development and possible developer adoption.
Open source ↗Why it matters: Engineering signal — public repo activity evidences active development and possible developer adoption.
Open source ↗Open-source spec framework with 20k+ stars.
Why it matters: Engineering signal — public repo activity evidences active development and possible developer adoption.
Open source ↗4 row(s)
Social presence and mentions. A soft signal — useful for gauging attention and launch reception, not a substitute for verified traction.
Why it matters: Attention signal — social mention or presence; soft signal of market interest.
Open source ↗Why it matters: Attention signal — social mention or presence; soft signal of market interest.
Open source ↗Why it matters: Attention signal — social mention or presence; soft signal of market interest.
Open source ↗Why it matters: Attention signal — social mention or presence; soft signal of market interest.
Open source ↗3 row(s)
Company blog and newsletters. Shipping cadence and technical depth of posts hint at product velocity and team quality.
OpenSpec is a lightweight, spec‑driven framework for coding agents and CLIs — universal, open source, and no API keys or MCP required.
Why it matters: Company publishing — post cadence and depth hint at product velocity.
Open source ↗OpenSpec is a lightweight, spec‑driven framework for coding agents and CLIs — universal, open source, and no API keys or MCP required.
Why it matters: Company publishing — post cadence and depth hint at product velocity.
Open source ↗OpenSpec is a lightweight, spec‑driven framework for coding agents and CLIs — universal, open source, and no API keys or MCP required.
Why it matters: Company publishing — post cadence and depth hint at product velocity.
Open source ↗Sign in as an active team member to view private notes, watchlist controls, transcript evidence, and interaction history.