Open-source thinking-framework skills that make rigorous reasoning executable for AI agents — first-principles, inversion, second-order thinking, Occam's razor, Bayesian reasoning. Built by deciqAI.
Skill Claude CodeCodex
Activate when: user says 'we're losing market share,' 'our growth keeps slowing and I don't know why,' 'a competitor is gaining on us fast,' 'what's the worst-case trajectory here,' or a business shows two or more consecutive quarters of declining key metrics with no identified reversal mechanism. Do NOT activate…
Skill Claude CodeCodex
Activate when: user says 'help me choose between two options with different risks', 'I need to map out what could happen if we go with X', 'we have a sequential decision — first we do A then depending on results we do B', 'what is the expected value of this investment given uncertain demand'. Do NOT activate when: the…
Skill Claude CodeCodex
Activate when: user says 'I can never find time for focused work', 'I feel busy but produce nothing', 'I keep getting interrupted', 'I want to protect my focus time', 'flow state', 'deliberate practice', 'Cal Newport', or asks how to make progress on hard cognitive work (research, writing, engineering, strategy). Do…
Skill Claude CodeCodex
Activate when: user says 'definite optimism,' 'Thiel's 2x2,' 'do we have a real plan or just options,' 'we're keeping our options open,' or asks whether a strategy/career/company is a concrete bet on the future or a diversified hedge; a plan consists mainly of process (iterate, A/B test, stay lean, stay flexible) with…
Skill Claude CodeCodex
Activate when: user says 'I've been doing this for years but I'm not getting better'; someone suspects a skill plateau despite continued effort; designing a learning program for a high-performance outcome; an organization reports high training hours but low skill transfer. Do NOT activate when: goal is execution of…
Skill Claude CodeCodex
Activate when: 'we have a strong product but keep losing on price', 'customers treat us like a commodity', 'how do we stop being compared to competitors', 'why aren't customers coming to us before they write the RFP', 'we want to define the category before someone else does'. Do NOT activate when: the customer's…
Skill Claude CodeCodex
Activate when: user asks 'why isn't anyone using our product?', 'how do we understand what customers really want?', 'we know the tech works but the market isn't responding', team is stuck on a single solution and needs divergent ideas, or someone discusses user research / personas / prototyping / iterative design. Do…
Skill Claude CodeCodex
Activate when: user says "I can't stop worrying about something I can't control," "I'm anxious about how this will turn out," "I keep replaying what went wrong," "I need them to change," "this uncertainty is paralyzing me," or is processing a setback, preparing for a high-stakes unknown outcome, or stuck in…
Skill Claude CodeCodex
Activate when: running sales discovery calls; deals stall because the buyer doesn't feel the pain; 'how do I run a sales call', 'my demos don't convert', qualifying a prospect. Do NOT activate when: the deal is transactional/self-serve with no call, or it's post-sale support. More: deciqai.com/s/discovery-call-spin.
Skill Claude CodeCodex
Activate when: a founder asks 'can we avoid competing head-on with big players?', someone asks 'is this disruption or just a price war?', an investor wonders if a startup's entry angle creates durable structural advantage, an incumbent spots a cheap new entrant and needs to know if it's a real threat, a product team…
Skill Claude CodeCodex
Activate when: an early founder is over-automating or waiting for growth to be 'efficient'; 'this won't scale', recruiting first users, delivering early service manually; concierge/white-glove starts. Do NOT activate when: the motion is already validated and the task is genuinely to scale it (then systemize/automate).…
Skill Claude CodeCodex
Activate when: user asks 'they made a big ask then backed off, should I concede?'; user is designing a negotiation opening and wants to land at a specific price; someone says 'anchor high then retreat' or 'reciprocal concession'; user suspects they are being manipulated by a two-step request pattern. Do NOT activate…
Skill Claude CodeCodex
Activate when: a decision feels obvious but the stakes are high; someone says 'I just trust my gut' on a consequential call; a team is converging fast without pushback; you're tired or pressured and still need to decide; you're in an unfamiliar domain moving on instinct. Do NOT activate when: the decision is genuinely…
Skill Claude CodeCodex
Activate when: team headcount is approaching or crossing 150 (or 50, or 500); someone says "coordination is getting harder," "we lost the startup feel," or "we don't know who does what anymore"; deciding whether to split a team, open a new office, or add a management layer. Do NOT activate when: group is well below 50…
Skill Claude CodeCodex
Activate when: someone says 'how hard could it be' about an unfamiliar domain; a novice dismisses expert opinion or says 'I could do that'; someone's self-assessed confidence seems disconnected from their actual track record; a hiring or promotion decision is driven by self-presentation; feedback loops are absent and…
Skill Claude CodeCodex
Activate when: user asks 'what is our real edge?', 'what will our moat look like in 3 years?', 'which capabilities should we invest in?', someone says 'competitive advantage' without a specific testable claim, or a team is assessing whether their current position will survive a technology or market shift. Do NOT…
Skill Claude CodeCodex
Activate when: user asks 'does this business have a moat', 'what stops competitors from copying us', 'how defensible is this company', 'is this advantage durable', evaluating a company for investment or acquisition, designing startup strategy for long-term defensibility, reviewing an investor pitch's…
Skill Claude CodeCodex
Activate when: user asks "will our margins improve as we grow?", "do we need scale to compete?", "why does our competitor charge less than us?", analyzing whether a business model has a cost advantage at higher volume, evaluating M&A "scale synergies," sizing minimum efficient scale, or deciding whether to invest in…
Skill Claude CodeCodex
Activate when: user says 'our culture isn't working despite directives', 'the market behaves unexpectedly', 'this worked at small scale but not at large scale', 'we can't predict or control what's happening', 'designing a platform/community/open-source project'. Do NOT activate when: the system is simple or mechanical…
Skill Claude CodeCodex
Activate when: seller is asking way more than buyers will pay; a founder or homeowner insists their asset is worth far more than market comps; a team refuses to cut a feature they built; a free-trial cancellation flow has more friction than signup; someone says 'I've put too much into this to sell for that.' Do NOT…
Skill Claude CodeCodex needs its repo
Activate when: self-employed / K-1 / variable-income client planning quarterly 1040-ES; 'how much should I set aside?', 'will I owe a penalty?', volatile income year. Do NOT activate when: W-2 withholding fully covers liability. More: deciqai.com/s/estimated-tax-safety-buffer.
Skill Claude CodeCodex
Activate when: user asks 'how much should I bet/invest on this?', 'what's the expected value here?', 'Kelly criterion', 'optimal bet size', 'fractional Kelly', 'how big a position should I take?', or is allocating capital across repeated decisions (ad spend by segment, VC portfolio construction, position sizing, A/B…
Skill Claude CodeCodex
Activate when: user says 'what would prove this wrong', 'how do we know if our strategy is working', 'what would change your mind', 'this claim feels unfalsifiable', or is designing a hypothesis/experiment/investment thesis that needs to be made testable. Do NOT activate when: the claim is genuinely non-empirical…
Skill Claude CodeCodex
Activate when: user says "we keep overshooting/undershooting", "the cure is causing the disease", "we're stuck in a loop", "why does this keep happening?", "the system keeps fighting back", "bullwhip effect", "death spiral", "growth flywheel"; system shows oscillation or sudden collapse; user is planning an…
At most 3 mods per repository are shown here, and a mod shipped inside a plugin is left to that plugin's page — the rest are on their repository pages: