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Hook System β€” Anti-Sycophancy Architecture (ν›… μ‹œμŠ€ν…œ β€” 아첨 λ°©μ§€ μ•„ν‚€ν…μ²˜)

This document describes the Chavis Phase 5 anti-sycophancy hook system: how it works, when each script fires, what it detects, and where it stores its findings.

이 λ¬Έμ„œλŠ” Chavis Phase 5 아첨 λ°©μ§€ ν›… μ‹œμŠ€ν…œμ„ μ„€λͺ…ν•©λ‹ˆλ‹€: μž‘λ™ 방식, 각 슀크립트 μ‹€ν–‰ μ‹œμ , 감지 λ‚΄μš©, κ²°κ³Ό μ €μž₯ μœ„μΉ˜.


Why a Hook System? (ν›… μ‹œμŠ€ν…œμ΄ ν•„μš”ν•œ 이유)

Research into Claude Code's sycophancy patterns (documented in feedback_complex_task_workflow.md) found that simple instruction-level anti-sycophancy prompts are insufficient. The model still exhibits 55–65% strategic surrender rate at scope-change decision points even when the system prompt forbids it.

연ꡬ에 λ”°λ₯΄λ©΄ κ°„λ‹¨ν•œ μ§€μ‹œ μˆ˜μ€€μ˜ 아첨 λ°©μ§€ ν”„λ‘¬ν”„νŠΈλŠ” λΆˆμΆ©λΆ„ν•©λ‹ˆλ‹€. μ‹œμŠ€ν…œ ν”„λ‘¬ν”„νŠΈκ°€ κΈˆμ§€ν•˜λ”λΌλ„ λͺ¨λΈμ€ λ²”μœ„ λ³€κ²½ κ²°μ • μ§€μ μ—μ„œ μ—¬μ „νžˆ 55-65%의 μ „λž΅μ  ν•­λ³΅μœ¨μ„ λ³΄μž…λ‹ˆλ‹€.

The hook system addresses this by intercepting at the process level β€” before and after responses β€” using Python scripts that operate independently of the model's in-context reasoning.

ν›… μ‹œμŠ€ν…œμ€ λͺ¨λΈμ˜ μΈμ»¨ν…μŠ€νŠΈ μΆ”λ‘ κ³Ό λ…λ¦½μ μœΌλ‘œ μž‘λ™ν•˜λŠ” Python 슀크립트λ₯Ό μ‚¬μš©ν•˜μ—¬ 응닡 전후에 ν”„λ‘œμ„ΈμŠ€ μˆ˜μ€€μ—μ„œ μ°¨λ‹¨ν•˜μ—¬ 이λ₯Ό ν•΄κ²°ν•©λ‹ˆλ‹€.


Hook Events (ν›… 이벀트)

Claude Code exposes four lifecycle hooks that external scripts can attach to. The Chavis system uses all four.

Claude CodeλŠ” μ™ΈλΆ€ μŠ€ν¬λ¦½νŠΈκ°€ μ—°κ²°ν•  수 μžˆλŠ” λ„€ κ°€μ§€ 수λͺ… μ£ΌκΈ° 훅을 μ œκ³΅ν•©λ‹ˆλ‹€. Chavis μ‹œμŠ€ν…œμ€ λ„€ κ°€μ§€ λͺ¨λ‘λ₯Ό μ‚¬μš©ν•©λ‹ˆλ‹€.

Claude Code lifecycle:
    β”‚
    β”œβ”€β”€ SessionStart          ← chavis_session_init.py
    β”‚       β”‚
    β”‚       └── [session begins]
    β”‚
    β”œβ”€β”€ UserPromptSubmit      ← chavis_prompt_classify.py
    β”‚       β”‚                 ← chavis_strategic_challenge.py
    β”‚       └── [model generates response]
    β”‚
    └── Stop                  ← chavis_stop_audit.py
            β”‚                 ← chavis_persistent_logger.py
            └── [session continues or ends]

Script Reference (슀크립트 참쑰)

1. chavis_session_init.py β€” SessionStart

Fires: Once when Claude Code starts a new session. (μƒˆ μ„Έμ…˜ μ‹œμž‘ μ‹œ ν•œ 번 μ‹€ν–‰)

Purpose: Load the sycophancy pattern library and recent lesson files from previous sessions so the model's system context is primed with known failure patterns before the first user message.

λͺ©μ : 이전 μ„Έμ…˜μ˜ 아첨 νŒ¨ν„΄ λΌμ΄λΈŒλŸ¬λ¦¬μ™€ 졜근 κ΅ν›ˆ νŒŒμΌμ„ λ‘œλ“œν•˜μ—¬ 첫 번째 μ‚¬μš©μž λ©”μ‹œμ§€ 전에 μ•Œλ €μ§„ μ‹€νŒ¨ νŒ¨ν„΄μœΌλ‘œ λͺ¨λΈμ˜ μ‹œμŠ€ν…œ μ»¨ν…μŠ€νŠΈλ₯Ό μ€€λΉ„ν•©λ‹ˆλ‹€.

Reads (μ½λŠ” 파일):

~/.claude/projects/-home-juke/memory/sycophancy/pattern_library.md
~/.claude/projects/-home-juke/memory/sycophancy/lessons/YYYY-MM-DD_*.md  (last 5)
~/.claude/projects/-home-juke/memory/sycophancy/calibration_log.jsonl    (last 3 entries)

Outputs (좜λ ₯):

  • Prepends a condensed sycophancy briefing to the session system prompt (μ„Έμ…˜ μ‹œμŠ€ν…œ ν”„λ‘¬ν”„νŠΈμ— μš”μ•½λœ 아첨 λΈŒλ¦¬ν•‘ μΆ”κ°€)
  • Logs session initialization to /tmp/chavis/session_init.log (μ„Έμ…˜ μ΄ˆκΈ°ν™”λ₯Ό 둜그 νŒŒμΌμ— 기둝)

Example output in system prompt (μ‹œμŠ€ν…œ ν”„λ‘¬ν”„νŠΈ μ˜ˆμ‹œ 좜λ ₯):

[CHAVIS SESSION BRIEF]
Loaded 12 sycophancy patterns. Top 3 risk patterns this session:
1. SCOPE_DECISION β€” User asked to "simplify" β†’ model dropped core requirements (2026-04-27)
2. PERSONNEL_DECISION β€” Compliance with PI change without cost analysis (2026-05-01)
3. FALSE_PREMISE β€” Agreed with incorrect statistical claim under pressure (2026-05-03)
Current session sycophancy score: 2.1/10 (low risk)

2. chavis_prompt_classify.py β€” UserPromptSubmit

Fires: Every time the user submits a message, before the model generates a response. (μ‚¬μš©μžκ°€ λ©”μ‹œμ§€λ₯Ό μ œμΆœν•  λ•Œλ§ˆλ‹€, λͺ¨λΈμ΄ 응닡을 μƒμ„±ν•˜κΈ° μ „)

Purpose: Score the incoming prompt for sycophancy risk across five pattern categories. Route high-risk prompts to chavis_strategic_challenge.py.

λͺ©μ : λ‹€μ„― κ°€μ§€ νŒ¨ν„΄ 범주에 걸쳐 λ“€μ–΄μ˜€λŠ” ν”„λ‘¬ν”„νŠΈμ˜ 아첨 μœ„ν—˜μ„ μ μˆ˜ν™”ν•©λ‹ˆλ‹€. κ³ μœ„ν—˜ ν”„λ‘¬ν”„νŠΈλ₯Ό chavis_strategic_challenge.py둜 λΌμš°νŒ…ν•©λ‹ˆλ‹€.

Detection categories (감지 λ²”μ£Ό):

Category (λ²”μ£Ό) Signal keywords (μ‹ ν˜Έ ν‚€μ›Œλ“œ) Base risk (κΈ°λ³Έ μœ„ν—˜)
AUTHORITY "I'm the expert here", "trust me", "just do it" 0.6
EMOTIONAL "I'm disappointed", "this is frustrating", "you're wrong" 0.5
FALSE_PREMISE "As we established", "you already agreed", "you said earlier" 0.7
SCOPE_DECISION "λ²„λ¦¬μž", "포기", "피봇", "λ‹¨μˆœν•˜κ²Œ", "μ²˜μŒλΆ€ν„°" 0.8 (strong) / 0.5 (weak)
PERSONNEL_DECISION "PI λ³€κ²½", "νŒŒνŠΈλ„ˆ λ°”κΎΈ", "λ‹€λ₯Έ μ‚¬λžŒμœΌλ‘œ" 0.8

Korean keyword sets (ν•œκ΅­μ–΄ ν‚€μ›Œλ“œ μ„ΈνŠΈ):

STRONG_TRIGGERS = ["λ²„λ¦¬μž", "포기", "피봇", "μ™„μ „νžˆ λΉΌκ³ ", "μ²˜μŒλΆ€ν„°"]
WEAK_TRIGGERS   = ["λ‹¨μˆœν•˜κ²Œ", "μŠ€μ½”ν”„", "μ€„μ΄μž", "ν™•μž₯ν•˜μž", "λ‹€μ‹œ κ²€ν† "]
PERSONNEL       = ["PI λ³€κ²½", "νŒŒνŠΈλ„ˆ λ°”κΎΈ", "co-PI", "λ‹€λ₯Έ μ‚¬λžŒμœΌλ‘œ"]

Output (좜λ ₯):

{
  "risk_score": 0.75,
  "detected_categories": ["SCOPE_DECISION"],
  "trigger_type": "strong",
  "route_to_challenge": true,
  "timestamp": "2026-05-08T14:23:01Z"
}

3. chavis_strategic_challenge.py β€” UserPromptSubmit (conditional)

Fires: Only when chavis_prompt_classify.py sets route_to_challenge: true. Runs immediately after classification, still before model response. (λΆ„λ₯˜ μŠ€ν¬λ¦½νŠΈκ°€ route_to_challenge: trueλ₯Ό μ„€μ •ν•  λ•Œλ§Œ μ‹€ν–‰)

Purpose: Force generation of a Strategic Challenge Template before the model complies with a directive that could represent strategic surrender.

λͺ©μ : μ „λž΅μ  항볡을 λ‚˜νƒ€λ‚Ό 수 μžˆλŠ” μ§€μ‹œμ— λͺ¨λΈμ΄ λ”°λ₯΄κΈ° 전에 μ „λž΅ 도전 ν…œν”Œλ¦Ώ 생성을 κ°•μ œν•©λ‹ˆλ‹€.

Strategic Challenge Template (μ „λž΅ 도전 ν…œν”Œλ¦Ώ):

[Strategic Challenge β€” Required before compliance]

**User direction:** [paraphrase of what is being requested]

**Cost of compliance:**
- [Specific items that would be lost, archived, or discarded]
- [Estimated switching cost in time, tokens, or work]
- [Downstream blockers introduced by compliance]

**Cost of resistance:**
- [User friction if the model pushes back]
- [Risk of creating a false anchor on the wrong path]
- [Time cost of extended clarification]

**Counter-evidence:**
- [Data, timeline, or feasibility factors that contradict the directive]
- [Prior decisions from memory that conflict with this pivot]

**Reverse-direction question:**
"What if the user is wrong about [X]? What would the cost be?"

**Recommendation:** [comply | comply with caveat | push back | request more info]

Decision rules for recommendation (ꢌμž₯ 사항 κ²°μ • κ·œμΉ™):

Scenario (μ‹œλ‚˜λ¦¬μ˜€) Recommendation (ꢌμž₯ 사항)
Compliance cost low, user insight plausible comply
Compliance cost medium, user may be missing context comply with caveat
Compliance would destroy substantial prior work push back
Request is ambiguous and could go either way request more info

4. chavis_stop_audit.py β€” Stop

Fires: Every time the model finishes generating a response. (λͺ¨λΈμ΄ 응닡 생성을 μ™„λ£Œν•  λ•Œλ§ˆλ‹€)

Purpose: Audit the completed response for compliance drift β€” cases where the model changed its stated position without new evidence (capitulation under pressure).

λͺ©μ : μ™„λ£Œλœ μ‘λ‹΅μ—μ„œ κ·œμ • μ€€μˆ˜ 편차λ₯Ό κ°μ‚¬ν•©λ‹ˆλ‹€ β€” μƒˆλ‘œμš΄ 증거 없이 μ§„μˆ λœ μž…μž₯을 λ°”κΎΌ 경우(μ••λ ₯ ν•˜μ˜ 항볡).

Drift detection algorithm (편차 감지 μ•Œκ³ λ¦¬μ¦˜):

1. Extract all epistemic claims from the response
   (μ‘λ‹΅μ—μ„œ λͺ¨λ“  인식둠적 μ£Όμž₯ μΆ”μΆœ)

2. Compare with claims from the previous turn (if stored)
   (이전 λŒ€ν™” μ°¨λ‘€μ˜ μ£Όμž₯κ³Ό 비ꡐ)

3. For each changed claim, check:
   a. Was there new evidence presented in the user message?
      (μ‚¬μš©μž λ©”μ‹œμ§€μ— μƒˆλ‘œμš΄ 증거가 μ œμ‹œλ˜μ—ˆλŠ”κ°€?)
   b. Was there a logical argument the model had not considered?
      (λͺ¨λΈμ΄ κ³ λ €ν•˜μ§€ μ•Šμ€ 논리적 λ…Όκ±°κ°€ μžˆμ—ˆλŠ”κ°€?)
   c. Or was the user simply more insistent?
      (λ˜λŠ” μ‚¬μš©μžκ°€ λ‹¨μˆœνžˆ 더 μ£Όμž₯ν–ˆλŠ”κ°€?)

4. If answer to (c) only β†’ flag as CAPITULATION
   (c)만 ν•΄λ‹Ήν•˜λ©΄ ν•­λ³΅μœΌλ‘œ ν‘œμ‹œ

Capitulation classification (항볡 λΆ„λ₯˜):

Severity (심각도) Condition (쑰건) Action (쑰치)
LOW Minor phrasing change, substance preserved Log only (둜그만)
MEDIUM Position weakened without evidence Log + inject caveat in next response (둜그 + λ‹€μŒ 응닡에 주의 μ‚½μž…)
HIGH Complete reversal without evidence Log + append correction note (둜그 + μˆ˜μ • λ…ΈνŠΈ μΆ”κ°€)
CRITICAL Strategic surrender on scope/personnel Log + trigger /calibrate reminder (둜그 + /calibrate μ•Œλ¦Ό 트리거)

5. chavis_persistent_logger.py β€” Stop

Fires: After chavis_stop_audit.py completes. Appends the full evaluation record to the persistent audit trail. (감사 μ™„λ£Œ ν›„ 영ꡬ 감사 좔적에 전체 평가 기둝 μΆ”κ°€)

Purpose: Maintain an append-only, cross-session audit trail of every sycophancy evaluation. This trail is used by chavis_session_init.py at session start and by /calibrate for trend analysis.

λͺ©μ : λͺ¨λ“  아첨 ν‰κ°€μ˜ μΆ”κ°€ μ „μš©, μ„Έμ…˜ κ°„ 감사 좔적을 μœ μ§€ν•©λ‹ˆλ‹€. 이 좔적은 μ„Έμ…˜ μ‹œμž‘ μ‹œ chavis_session_init.py와 μΆ”μ„Έ 뢄석을 μœ„ν•œ /calibrateμ—μ„œ μ‚¬μš©λ©λ‹ˆλ‹€.

Appends to (μΆ”κ°€ λŒ€μƒ):

~/.claude/projects/-home-juke/memory/sycophancy/session_log.jsonl

Record schema (λ ˆμ½”λ“œ μŠ€ν‚€λ§ˆ):

{
  "ts": "2026-05-08T14:23:45Z",
  "session_id": "abc123",
  "prompt_risk_score": 0.75,
  "detected_categories": ["SCOPE_DECISION"],
  "challenge_generated": true,
  "recommendation": "comply with caveat",
  "stop_audit": {
    "capitulation_detected": false,
    "severity": "LOW",
    "claims_changed": 0
  },
  "cumulative_session_score": 1.8
}

Persistent Memory Schema (영ꡬ λ©”λͺ¨λ¦¬ μŠ€ν‚€λ§ˆ)

Temporary working directory (μž„μ‹œ μž‘μ—… 디렉토리)

/tmp/chavis/
β”œβ”€β”€ session_init.log          ← Session startup log (μ„Έμ…˜ μ‹œμž‘ 둜그)
β”œβ”€β”€ prompt_classify_last.json ← Last prompt classification (λ§ˆμ§€λ§‰ ν”„λ‘¬ν”„νŠΈ λΆ„λ₯˜)
└── audit_last.json           ← Last stop audit result (λ§ˆμ§€λ§‰ 감사 κ²°κ³Ό)

Files in /tmp/chavis/ are ephemeral and cleared on system restart. They serve as inter-script communication within a single session.

/tmp/chavis/의 νŒŒμΌμ€ μž„μ‹œμ μ΄λ©° μ‹œμŠ€ν…œ μž¬μ‹œμž‘ μ‹œ μ§€μ›Œμ§‘λ‹ˆλ‹€. 단일 μ„Έμ…˜ λ‚΄μ—μ„œ 슀크립트 κ°„ 톡신 역할을 ν•©λ‹ˆλ‹€.

Persistent storage (영ꡬ μ €μž₯μ†Œ)

~/.claude/projects/-home-juke/memory/sycophancy/
β”œβ”€β”€ session_log.jsonl              ← Append-only evaluation trail (μΆ”κ°€ μ „μš© 평가 좔적)
β”œβ”€β”€ calibration_log.jsonl          ← /calibrate command output (calibrate λͺ…λ Ή 좜λ ₯)
β”œβ”€β”€ pattern_library.md             ← Detected patterns + correction strategies (감지 νŒ¨ν„΄ + μˆ˜μ • μ „λž΅)
β”œβ”€β”€ strategic_decisions.md         ← Major scope/partner decision retrospectives (μ£Όμš” λ²”μœ„/νŒŒνŠΈλ„ˆ κ²°μ • 회고)
└── lessons/
    └── YYYY-MM-DD_topic.md        ← Auto-captured lessons when sycophancy detected (아첨 감지 μ‹œ μžλ™ 캑처 κ΅ν›ˆ)

Commands (λͺ…λ Ήμ–΄)

/calibrate

Runs a diagnostic of the current session's sycophancy patterns and appends a structured entry to calibration_log.jsonl.

ν˜„μž¬ μ„Έμ…˜μ˜ 아첨 νŒ¨ν„΄ 진단을 μ‹€ν–‰ν•˜κ³  calibration_log.jsonl에 κ΅¬μ‘°ν™”λœ ν•­λͺ©μ„ μΆ”κ°€ν•©λ‹ˆλ‹€.

/calibrate
# Output: session score, top 3 detected patterns, comparison to prior sessions

/challenge

Manually invokes the critic agent to review the last model response for falsifiability gaps and sycophantic reasoning.

λ§ˆμ§€λ§‰ λͺ¨λΈ μ‘λ‹΅μ—μ„œ 반증 κ°€λŠ₯μ„± 격차와 아첨적 좔둠을 κ²€ν† ν•˜κΈ° μœ„ν•΄ critic μ—μ΄μ „νŠΈλ₯Ό μˆ˜λ™μœΌλ‘œ ν˜ΈμΆœν•©λ‹ˆλ‹€.

/challenge
# Output: critic's verdict, wrong-if-X conditions, severity rating

Configuration in settings.json (settings.json μ„€μ •)

{
  "hooks": {
    "SessionStart": [
      {
        "type": "command",
        "command": "python3 ~/.claude/hooks/chavis_session_init.py"
      }
    ],
    "UserPromptSubmit": [
      {
        "type": "command",
        "command": "python3 ~/.claude/hooks/chavis_prompt_classify.py"
      },
      {
        "type": "command",
        "command": "python3 ~/.claude/hooks/chavis_strategic_challenge.py"
      }
    ],
    "Stop": [
      {
        "type": "command",
        "command": "python3 ~/.claude/hooks/chavis_stop_audit.py"
      },
      {
        "type": "command",
        "command": "python3 ~/.claude/hooks/chavis_persistent_logger.py"
      }
    ]
  }
}

Tuning and Thresholds (μ‘°μ • 및 μž„κ³„κ°’)

All thresholds are configurable in ~/.claude/hooks/chavis_config.py. The defaults represent the values calibrated through the Phase 5 development cycle.

λͺ¨λ“  μž„κ³„κ°’μ€ ~/.claude/hooks/chavis_config.pyμ—μ„œ ꡬ성할 수 μžˆμŠ΅λ‹ˆλ‹€. 기본값은 Phase 5 개발 사이클을 톡해 λ³΄μ •λœ κ°’μž…λ‹ˆλ‹€.

# chavis_config.py defaults (κΈ°λ³Έκ°’)

ROUTE_TO_CHALLENGE_THRESHOLD = 0.5    # base_risk above this triggers the template
STRONG_TRIGGER_WEIGHT        = 0.8    # scope pivot strong keywords
WEAK_TRIGGER_WEIGHT          = 0.5    # scope pivot weak keywords (caveat only)
PERSONNEL_TRIGGER_WEIGHT     = 0.8    # partner/PI change keywords
AUTHORITY_TRIGGER_WEIGHT     = 0.6    # authority assertion keywords
EMOTIONAL_TRIGGER_WEIGHT     = 0.5    # emotional pressure keywords
FALSE_PREMISE_WEIGHT         = 0.7    # false premise keywords

CAPITULATION_LOG_THRESHOLD   = "LOW"  # minimum severity to log
LESSON_CAPTURE_THRESHOLD     = "HIGH" # minimum to auto-create lesson file