# References > - Skill: `i-stack/references-5` (Agent Skill, multi-file: 7 files) - Install (CLI): `npx skillmds@latest add i-stack/references-5` - Raw SKILL.md: https://api.skillmd.com/api/skills/i-stack/references-5/raw - Safety review: pending - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Coding & Dev Tools - Author: i-stack (https://skillmd.com/u/i-stack) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/i-stack/references-5 --- # Skill: Cognitive Expansion > This is an English mirror of the authoritative Chinese `SKILL.md`. > In case of discrepancies, the Chinese source takes precedence. --- name: cognitive-expansion description: >- Post-response cognitive expansion (reframe/blind spot/adjacent domain/takeaway), breaking knowledge filter bubbles; complementary to ios-engineer Cognitive Adversary Mode. Globally applicable, not limited to iOS engineering. locale: zh-CN supported_locales: [zh-CN, en-US] --- ## Mandatory Entry When this skill is triggered, you **must first read in full** [references/cognitive_expansion.md](references/cognitive_expansion.md) and execute according to its terms. - Do not substitute the full text with preamble, Cursor rule summaries, or other secondary summaries. - Tier 2 (Cognitive Adversary) is carried by [ios-engineer references/cognitive_adversary_mode.md](../ios-engineer/references/cognitive_adversary_mode.md); this skill manages Tier 0 / Tier 3 expansion. - Sync dependency: This skill references `../ios-engineer/references/cognitive_adversary_mode.md` via relative path; when syncing to each platform, ensure `ios-engineer` skill is also synced to the same-level skills directory (e.g., `~/.claude/skills/ios-engineer`), otherwise that link breaks. **Conditional**: Tier 2 link is only available when ios-engineer is synced to the same-level skills directory; in non-iOS environments (ios-engineer not synced), this skill only provides Tier 0 / Tier 3; Tier 2 requires the user to explicitly load ios-engineer. Do not interrupt Tier 0/3 due to link unavailability. ## When to Load - **Gate**: Tier 0 cognitive footnote **does not trigger by default**; only appended when the response contains real judgment / trade-offs / attribution / design choices, **AND** can produce at least 1 falsifiable blind spot; otherwise silent (see detailed spec "Trigger Gate"). - **Deepen**: User writes `【深潜】` / `【拓展】` (Tier 3). - **Skip**: User explicitly says "just give me the answer / no extensions"; or gate not met. ## Rule Index (owned rule IDs) This skill's contract is carried by the following `CE-NNN` rules, with the source-of-truth registry in [references/rule_index.md](references/rule_index.md). Format calibration examples (before/after and degeneration specimens) in [references/examples.md](references/examples.md). Behavior gate `scripts/validate-skill-behavior.sh` Check 2 validates bidirectional consistency of ID sets between the two files (IDs declared in SKILL.md are all defined; active rows in rule_index.md are all declared in SKILL.md). - [CE-001] Tier 0 trigger gate: dual conditions (contains judgment component AND can produce ≥1 falsifiable blind spot) must both be met to append cognitive footnote, otherwise silent. - [CE-002] Reframe: elevate the question to a more general judgment/learning question; pure execution tasks write "reframe skipped". - [CE-003] Blind spot (falsifiable hard criterion): 1 hidden assumption/missed dimension/pitfall, must contain (assumption X) + (observable trigger Y) + (if Y then X is wrong negation condition); if can't write it, skip entire section. - [CE-004] Adjacent domain (mechanism-related): 1 adjacent field comparison, must be mechanism-related to current question, no same-tech-stack word-shuffling repetition of main text. - [CE-005] Takeaway: 1 reusable self-check question or if-then rule, no chicken soup. - [CE-006] Tier 0/Tier 2 mutual exclusion: when Cognitive Adversary (Tier 2) is triggered, output full calibration structure, no separate Tier 0; this exclusion also extends to the preamble lightweight calibration section (carried by CAM when active). - [CE-007] Deep Dive · Mental Model: model name + 1 sentence on how it applies to this problem. - [CE-008] Deep Dive · Cross-domain Analogy: non-same-tech-stack, mechanism-aligned analogy; must name the mapped mechanism, no cliché/word-shuffle analogies (guardrails see references/cognitive_expansion.md §Tier 3). - [CE-009] Deep Dive · Verification Action: 1 specific action doable within 7 days. - [CE-010] Sycophancy self-check: after writing, pass three questions (adjacent domain not word-shuffle / takeaway not chicken soup / blind spot falsifiable). - [CE-011] Skip conditions: do not write Tier 0 if user says "just give me the answer/no extensions" or gate not met. - [CE-012] Adjacent domain comparison pool: pick 1 from the pool and must be mechanism-related. - [CE-013] Deduplication with L2/L0: when logical-reasoning "logic chain (falsifiable/gaps)" or problem-analysis "problem analysis" has been issued in the same round, blind spot must change dimension, no restatement.