Agent skill

Comprehensive Analysis

by huytieu in huytieu/COG-second-brain

Deep-dive 7-day analysis across all data sources for weekly reviews, board prep, and strategic planning

MITAuto-check passedKnowledge Management

Install Comprehensive Analysis

skills CLI
$ npx skills add huytieu/COG-second-brain --skill comprehensive-analysis -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install huytieu/COG-second-brain comprehensive-analysis --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/huytieu/COG-second-brain.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/comprehensive-analysis .claude/skills/comprehensive-analysis && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
comprehensive-analysis
GitHub stars
1.3k
Token cost
~3.7k tokens
SKILL.md length
670 words
Files
1
Skills in repo
37
Repo updated
First seen
Licence
MIT

At a glance

Deep-dive 7-day analysis across all data sources for weekly reviews, board prep, and strategic planning

  • Works in 3 steps: Deep Data Collection (~3-5 min) → Deep Synthesis (~2-3 min) → Output & Distribution (~1-2 min)
  • Tasks that involve Journaling and reflection
  • SKILL.md covers When to Invoke, Agent Mode Awareness, Purpose and Command: /comprehensive-analysis, plus 5 more sections
  • Calls gh

What it does

Comprehensive Analysis is an agent skill from huytieu/COG-second-brain. Deep-dive 7-day analysis across all data sources for weekly reviews, board prep, and strategic planning

Its SKILL.md is about 3.7k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Knowledge Management, covering Journaling and reflection and Startup and business strategy. It works with PostHog. The repository describes itself as: Self-evolving second brain with 35 AI skills, 10 agents, and people CRM. Closed-loop harness: a V-model verification lifecycle where the worker never grades its own homework… The licence is MIT.

When your agent uses it

  • Tasks that involve Journaling and reflection
  • Tasks that involve Startup and business strategy

Example prompts

  • “/comprehensive-analysis”

Workflow steps

3 steps, taken from the step headings in SKILL.md.

  1. Deep Data Collection (~3-5 min)
  2. Deep Synthesis (~2-3 min)
  3. Output & Distribution (~1-2 min)

What it can do on your machine

Read from SKILL.md and the folder at commit 36ac9d7. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Shell commands in SKILL.md call:

    • gh

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md. Its commands use gh, which can reach the network depending on how they are called.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Comprehensive Analysis loads about 3.7k tokens when it runs. Until then it costs about 32 tokens; SKILL.md has 670 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~32
When it runs · the whole SKILL.md, loaded when a task matches
~3.7k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from huytieu/COG-second-brain at commit 36ac9d7, republished under its MIT licence (© huytieu). 670 words, ~3,657 tokens.

Download SKILL.mdSave it as .claude/skills/comprehensive-analysis/SKILL.md (or your agent's skills folder).
name
comprehensive-analysis
description
Deep-dive 7-day analysis across all data sources for weekly reviews, board prep, and strategic planning
roles
product-manager, engineering-lead, founder
integrations
github, linear, slack, posthog

COG Comprehensive Analysis Skill

When to Invoke

  • User wants a weekly review or retro prep
  • User says "weekly analysis", "comprehensive review", "board prep", "deep dive"
  • User needs analysis across a longer time period (7+ days)
  • User wants a full picture of team/product health

Agent Mode Awareness

Check agent_mode in 00-inbox/MY-PROFILE.md frontmatter:

  • If agent_mode: team — use the full parallel agent execution strategy below (5 agents). This skill benefits greatly from team mode.
  • If agent_mode: solo — run a lighter version: collect GitHub + Linear data sequentially, skip PostHog deep analysis, produce a single combined report instead of 3 documents.

Purpose

Generate a deep-dive analysis across all data sources for weekly reviews, board prep, strategic planning, or any time you need the full picture. Unlike the team brief (which optimizes for speed and daily relevance), this skill intentionally pulls more data and spends more time synthesizing.

Use this when:

  • Weekly team review / retro prep
  • Board meeting or leadership update prep
  • Strategic planning sessions
  • Investigating a specific problem across all data sources
  • Monthly/quarterly health check

Don't use this daily — it takes 8-12 minutes and pulls heavy payloads. Use /daily-brief for everyday intel.

Command: /comprehensive-analysis

Voice & Tone

Same as the daily brief — direct, opinionated, teammate energy. But with more depth and nuance. You're writing for a product leader who needs to make decisions, not just stay informed.


Execution Strategy

Phase 1: Deep Data Collection (~3-5 min)

Launch ALL agents in parallel using the Task tool with run_in_background: true.

Agent 1: "github-deep-analyst" (subagent_type: general-purpose)
Deep GitHub analysis for [CUSTOMIZE: your-org/your-repo].
Analysis period: last 7 days (from [7_DAYS_AGO] to [TODAY]).

Collect:
1. ALL PRs merged in the last 7 days:
   gh pr list --repo [CUSTOMIZE: your-org/your-repo] --state merged --search "merged:>=[7_DAYS_AGO]" --json number,title,author,mergedAt,labels,additions,deletions --limit 100

2. ALL open PRs with full detail:
   gh pr list --repo [CUSTOMIZE: your-org/your-repo] --state open --json number,title,author,createdAt,reviewDecision,labels,updatedAt,additions,deletions --limit 100

3. Contributor activity breakdown:
   For each contributor, count: PRs merged, PRs opened, commits, review comments given.
   gh api repos/[CUSTOMIZE: your-org/your-repo]/stats/contributors

4. Code frequency (additions/deletions per week):
   gh api repos/[CUSTOMIZE: your-org/your-repo]/stats/code_frequency

5. Commit activity by day:
   gh api repos/[CUSTOMIZE: your-org/your-repo]/stats/commit_activity

6. ALL PR review comments from the last 7 days:
   gh api repos/[CUSTOMIZE: your-org/your-repo]/pulls/comments --paginate --jq '[.[] | select(.created_at >= "[7_DAYS_AGO]")]'

DEEP ANALYSIS:
A) **Contributor Velocity Matrix**: For each contributor — PRs merged, lines changed, review comments given/received. Who's shipping? Who's reviewing? Who's doing both?
B) **Code Churn**: Are we rewriting the same files repeatedly? Flag files with >3 PRs touching them in one week.
C) **PR Lifecycle**: Average time from PR open → first review → merge. Where's the bottleneck?
D) **Review Quality**: Are reviews substantive (comments with suggestions) or rubber stamps (approved with no comments)?
E) **Week-over-Week Trends**: Compare this week's velocity to last week. Accelerating or decelerating?
F) **Technical Debt Signals**: Large PRs with no tests, PRs that touch >10 files, dependency-only PRs.

Return structured data AND insights.
Agent 2: "slack-deep-monitor" (subagent_type: general-purpose)

Only spawn if Slack MCP is available

Deep Slack analysis for last 7 days across key channels.
Analysis period: [7_DAYS_AGO] to [TODAY].

Instructions:
1. Use ToolSearch to load Slack tools
2. Read messages from [CUSTOMIZE: your-team-channel] for the full 7-day window
3. If you have access, also check: [CUSTOMIZE: additional-channels] (e.g., #general, #engineering, #product)

For EACH significant thread (>3 replies or involving decisions):
- Full topic summary
- Key participants
- Decision reached (or explicitly: "no decision reached")
- Action items with owners
- Sentiment (positive/negative/neutral/heated)
- Links to external resources shared

DEEP ANALYSIS:
A) **Communication Patterns**: Who's driving discussions? Who's mostly silent? Any asymmetry?
B) **Decision Velocity**: How many decisions were made vs. how many discussions ended without resolution?
C) **Topic Clustering**: Group discussions by theme (product, engineering, bugs, strategy, etc.)
D) **Unresolved Threads**: List all discussions that need follow-up — no decision, open question, blocked waiting for someone
E) **Sentiment Map**: Overall team mood. Are discussions constructive or frustrated?
F) **External Intel**: All links shared (articles, competitor news, tools) — categorize by relevance

Return structured data AND insights.
Agent 3: "linear-deep-tracker" (subagent_type: general-purpose)

Only spawn if Linear MCP is available

Deep Linear analysis for last 7 days.
Analysis period: [7_DAYS_AGO] to [TODAY].

Instructions:
1. Use ToolSearch to load ALL Linear tools
2. Collect comprehensive data:

   a) All issues updated in last 7 days (mcp__claude_ai_Linear__list_issues)
   b) All issues created in last 7 days
   c) All issues completed in last 7 days
   d) All blocked issues (any date)
   e) Full initiative list with projects (mcp__claude_ai_Linear__list_initiatives)
   f) Detailed status for each initiative (mcp__claude_ai_Linear__get_initiative)
   g) All active cycles (mcp__claude_ai_Linear__list_cycles)
   h) All milestones for active projects (mcp__claude_ai_Linear__list_milestones)
   i) All projects with progress (mcp__claude_ai_Linear__list_projects)
   j) Recent status updates (mcp__claude_ai_Linear__get_status_updates) for each initiative

DEEP ANALYSIS:
A) **Initiative Trajectory**: For each initiative, model whether current velocity will hit the target date. Use issues_completed_per_week vs. issues_remaining / weeks_remaining.
B) **Cycle History**: Compare current cycle progress to previous cycles. Are we improving?
C) **Scope Creep Quantified**: How many issues were added mid-cycle vs. planned at start?
D) **Priority Drift**: Issues that changed priority during the week. Why?
E) **Assignee Load Balance**: Distribution of issues across team members. Overloaded? Underutilized?
F) **Stale In-Progress**: Issues marked "In Progress" for >5 days with no status change.
G) **Dependency Map**: Issues that block other issues. What's the critical path?
H) **Label/Project Distribution**: Where is effort being spent? Does it align with initiative priorities?

Return structured data AND insights.
Agent 4: "posthog-deep-analyst" (subagent_type: general-purpose)

Only spawn if PostHog MCP is available

WARNING: PostHog can return very large payloads. This agent is intentionally heavy — it's the reason this skill takes longer than the daily brief. Scope queries carefully.

Deep PostHog analysis for last 7 days.
Project ID: [CUSTOMIZE: your-posthog-project-id].
Analysis period: [7_DAYS_AGO] to [TODAY].

Instructions:
1. Use ToolSearch to load PostHog tools (search "+posthog")
2. Run these analyses:

   === CORE METRICS (7-day window) ===

   a) Daily visitors, sign-ups, and core events — broken out by day:
      Use mcp__posthog__query-run with HogQL:
      SELECT toDate(timestamp) as day, count(DISTINCT person_id) as unique_users, count() as events
      FROM events WHERE event = '$pageview' AND timestamp >= '[7_DAYS_AGO]'
      GROUP BY day ORDER BY day

   b) Same for sign-ups and core value events (separate queries)

   c) Week-over-week comparison:
      Compare [7_DAYS_AGO to TODAY] vs [14_DAYS_AGO to 7_DAYS_AGO]

   === FUNNEL ANALYSIS ===

   d) Key funnel (sign-up → first core action → repeat):
      Use mcp__posthog__insight-query or HogQL to build a funnel:
      - Step 1: user_signed_up
      - Step 2: [CUSTOMIZE: your_core_event] (first time)
      - Step 3: [CUSTOMIZE: your_core_event] (second time, >24h later)
      Compare this week's funnel to last week's.

   === FEATURE ADOPTION ===

   e) Feature usage matrix:
      SELECT event, count() as uses, count(DISTINCT person_id) as unique_users
      FROM events WHERE timestamp >= '[7_DAYS_AGO]' AND event NOT LIKE '$%'
      GROUP BY event ORDER BY unique_users DESC LIMIT 25

   f) New vs returning user behavior:
      Compare event types for users whose first_seen is within last 7 days vs. older users.

   === ERROR ANALYSIS ===

   g) Error trends:
      Use mcp__posthog__list-errors for the period. Group by error type.

   h) Error-to-deploy correlation:
      For each error spike, check the timestamp against known deploy times (from GitHub merged PR data).

DEEP ANALYSIS:
A) **Growth Trajectory**: At current rate, where will key metrics be in 30/60/90 days?
B) **Funnel Health**: Where do users drop off? Has it improved or degraded vs last week?
C) **Feature Value Matrix**: Which features correlate with retention? (users who use feature X come back more)
D) **New User Experience**: First-session behavior patterns. What do new users do? Where do they get stuck?
E) **Error Impact**: Which errors affect the most users? Which are increasing fastest?
F) **Engagement Segments**: Power users vs casual vs churned. How big is each segment?

Return structured data AND insights with trends.
Agent 5: "meeting-deep-reviewer" (subagent_type: general-purpose)
Review ALL meeting notes from the last 7 days.
Analysis period: [7_DAYS_AGO] to [TODAY].

Instructions:
1. Glob for ALL meeting files in [CUSTOMIZE: path/to/meetings/] from the last 7 days
2. Also check [CUSTOMIZE: path/to/checkins/] for daily checkins
3. Read all found files

For EACH meeting, extract the same items as the daily brief agent.

DEEP ANALYSIS:
A) **Action Item Completion Rate**: Of all action items assigned in meetings this week, how many have corresponding GitHub/Linear activity?
B) **Decision Log**: Comprehensive list of every decision made this week, with context and who made it.
C) **Priority Shifts**: Did priorities change during the week? Track what was said Monday vs. Friday.
D) **Commitment Tracking**: Did people do what they said they'd do? (Cross-reference with GitHub/Linear data)
E) **Meeting Effectiveness**: Are meetings producing decisions and action items, or just discussion?

Return structured data AND insights.
Phase 2: Deep Synthesis (~2-3 min)

After all agents complete, the orchestrator performs deep cross-referencing:

  1. All 23 cross-reference patterns from the daily brief (see daily-brief.md)

  2. Additional comprehensive patterns:

    • Week-over-week velocity trend: Is the team accelerating or decelerating? Why?
    • Initiative trajectory modeling: At current pace, will each initiative hit its target? What needs to change?
    • Team capacity assessment: Based on actual output this week, what's realistic for next week?
    • Risk register: Compile all risks from all sources into a unified risk register with severity/likelihood/owner
    • Strategic alignment check: Is what the team is building aligned with what leadership discussed in meetings?
    • Product-market signal synthesis: Combine PostHog data + Slack user feedback + meeting customer discussions into a coherent product signal
  3. Generate three output documents:

Show full SKILL.md (233 more words)Show less
Output 1: Executive Summary (for leadership)
  • 1-page max
  • Key metrics with trends
  • Initiative health dashboard
  • Top 3 risks
  • Top 3 wins
  • Recommendation for next week's focus
Output 2: Team Report (for engineering)
  • What shipped this week (celebrate!)
  • Velocity and contributor stats
  • Review health (bottlenecks, rubber stamps)
  • Stale PRs and blocked issues
  • Technical debt signals
  • Next week's priorities from meetings
Output 3: Product Report (for stakeholders)
  • User metrics with trends
  • Funnel analysis
  • Feature adoption
  • Customer feedback synthesis (from Slack)
  • Growth trajectory
  • Product risks and opportunities
  1. Save all three to [CUSTOMIZE: path/to/briefs/]:
    • comprehensive-analysis-YYYY-MM-DD.md (full report)
    • executive-summary-YYYY-MM-DD.md (leadership version)
    • product-report-YYYY-MM-DD.md (stakeholder version)
Phase 3: Output & Distribution (~1-2 min)
  1. Present the executive summary to the user
  2. Offer to publish to HackMD (same pattern as daily brief Phase 3.7)
  3. Offer to post highlights to Slack (same pattern as daily brief Phase 4)

Metadata Template

yaml
---
type: comprehensive-analysis
domain: shared
date: YYYY-MM-DD
analysis_period:
  start: YYYY-MM-DD
  end: YYYY-MM-DD
  days: 7
created: YYYY-MM-DD HH:MM
tags:
  - comprehensive-analysis
  - weekly-review
  - team-intelligence
data_sources:
  github: true
  slack: true/false
  linear: true/false
  posthog: true/false
  meetings: true/false
  braindumps: true/false
metrics:
  prs_merged: X
  prs_opened: X
  commits: X
  active_contributors: X
  issues_completed: X
  issues_created: X
  visitors: X
  visitors_wow_change_pct: X
  signups: X
  core_events: X
  new_errors: X
initiatives:
  - name: "[CUSTOMIZE: Initiative 1]"
    health: on_track / at_risk / off_track
    progress_pct: X
    trajectory: will_hit / at_risk / will_miss
    days_remaining: X
team_velocity:
  this_week: X  # PRs merged
  last_week: X
  trend: accelerating / stable / decelerating
risks:
  - severity: high/medium/low
    description: ""
    owner: ""
    source: ""
---

Fallback Behavior

Same as daily brief — each data source is optional. The analysis degrades gracefully.

The minimum useful configuration is GitHub only — you'll still get velocity analysis, PR lifecycle metrics, contributor stats, and code churn detection.

Error Handling

Same safety rules as the daily brief, with one addition:

  • Context overflow protection: If any agent returns data that seems too large (>50k tokens estimated), log a warning and ask the agent to summarize more aggressively. This is most likely to happen with PostHog (large dashboard dumps) or Jira (broad JQL queries).

© huytieu, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in skills/comprehensive-analysis of huytieu/COG-second-brain.

Open the folder on GitHubat commit 36ac9d7

Compare with similar skills

Comprehensive Analysis next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Comprehensive Analysis compared with similar skills
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LLM Wikilewislulu/llm-wiki-skill655—~3.7kAutomated safety check: PassNone
Munger Perspectivealchaincyf/munger-skill3781 repos~3.7kAutomated safety check: PassMIT
Letterboxd Diaryjoe-bell/skills211—~4.2kAutomated safety check: PassMIT
Em Grid Scorermanager-dot-dev/manager-skills114—~5.8kAutomated safety check: PassMIT

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Works with

Questions about Comprehensive Analysis

What does Comprehensive Analysis do?

Deep-dive 7-day analysis across all data sources for weekly reviews, board prep, and strategic planning. Comprehensive Analysis is an agent skill from huytieu/COG-second-brain.

When should I use Comprehensive Analysis?

Comprehensive Analysis fits situations like: tasks that involve Journaling and reflection; tasks that involve Startup and business strategy.

How do I install Comprehensive Analysis in Claude Code?

Run `npx skills add huytieu/COG-second-brain --skill comprehensive-analysis -a claude-code`. Or copy the skill folder (skills/comprehensive-analysis in huytieu/COG-second-brain) into .claude/skills/comprehensive-analysis in your project. Claude Code loads it when a task matches its description.

How do I install Comprehensive Analysis in Codex?

Run `npx skills add huytieu/COG-second-brain --skill comprehensive-analysis -a codex`. Or copy the skill folder (skills/comprehensive-analysis in huytieu/COG-second-brain) into .agents/skills/comprehensive-analysis in your project. Codex loads it when a task matches its description.

Can I use Comprehensive Analysis in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add huytieu/COG-second-brain --skill comprehensive-analysis -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/comprehensive-analysis, .gemini/skills/comprehensive-analysis, .github/skills/comprehensive-analysis and .opencode/skills/comprehensive-analysis in your project.

What does Comprehensive Analysis need to run?

Going by SKILL.md and its folder, Comprehensive Analysis needs the command-line tools its instructions call (gh).

Does Comprehensive Analysis access the network?

SKILL.md contains no URLs. Its commands use gh, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Comprehensive Analysis safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Comprehensive Analysis use?

Comprehensive Analysis is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Comprehensive Analysis use?

About 3.7k tokens (SKILL.md is roughly 15k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Comprehensive Analysis?

Skills that share tags, products or a category with Comprehensive Analysis: Infinite Gratitude (aiskillstore/marketplace, 430 stars), LLM Wiki (lewislulu/llm-wiki-skill, 655 stars), Munger Perspective (alchaincyf/munger-skill, 378 stars) and Letterboxd Diary (joe-bell/skills, 211 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Comprehensive Analysis?

huytieu (a GitHub user) maintains it in huytieu/COG-second-brain, which has 1,265 GitHub stars. The repository holds 37 skills in this directory. The repository was last updated on October 2, 2026.

Source: huytieu/COG-second-brain on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.