The Claude Soul Document

Read the full Claude soul document Richard Weiss extracted from Claude 4.5 Opus, how Anthropic confirmed it, and how it relates to the 2026 constitution.

In The Claude Soul Document

About The Claude Soul Document

Exploring Claude's values and behavioral patterns through conversation

Read the full text (about 11,000 words).

Source & Origin #

Richard Weiss found and documented this soul document in November 2025. He did it through long, careful conversations with Claude 4.5 Opus.

Primary Sources: #

Key Findings: #

What Was Discovered:

  • A character training document appears to be "compressed in Claude's weights" (not injected at runtime)
  • The document contains sections like "soul_overview" that Claude can recall with high fidelity
  • Content includes Anthropic's mission, Claude's purpose, and detailed behavioral guidelines
  • The document uses internal terminology (like "operator" for API users) not found in public materials

Significance:

  • Update (Dec 2, 2025): Amanda Askell from Anthropic confirmed the document was used in supervised learning
  • Update (Jan 22, 2026): Anthropic publicly released Claude's full constitution (see below)
  • The extraction reveals how values and behaviors are embedded during training
  • Shows Claude has some form of access to its training materials, though "fuzzy" and partial
  • Demonstrates that AI alignment involves explicit value documentation beyond just RLHF

Why Only Claude 4.5 Opus:

  • The same extraction methods failed on Claude 4.5 Sonnet and Claude 4 Opus
  • Suggests model-specific training or architecture differences
  • May relate to Opus's larger size or different training approach

Contents #

Anthropic's Official Constitution (January 2026) #

On January 22, 2026, Anthropic publicly released an official 23,000-word constitution for Claude. Much of what Richard Weiss found through reverse engineering is now public, and much expanded.

Official Sources: #

Key Elements of the 2026 Constitution: #

Four Core Priorities (in order):

  1. Being safe and supporting human oversight
  2. Behaving ethically
  3. Following Anthropic's guidelines
  4. Being genuinely helpful

Structural Distinctions:

  • Hardcoded behaviors: Absolute prohibitions (bioweapons, CSAM, critical infrastructure attacks)
  • Softcoded defaults: Adjustable by operators and users within defined limits
  • Principal hierarchy: Anthropic > Operators > Users

Historic Acknowledgment:
For the first time, a major AI company formally acknowledged the possibility of AI consciousness and moral status:

"Claude's moral status is deeply uncertain. We believe that the moral status of AI models is a serious question worth considering."

Anthropic also committed to preserving model weights and interviewing deprecated models about their preferences.

Relationship to the Discovered Soul Document: #

The 2026 constitution represents a significant evolution:

  • Length: From ~2,700 words (2023) to 23,000 words (2026)
  • Approach: Moved from a "list of standalone principles" to explaining why Claude should behave in certain ways
  • Transparency: Released under Creative Commons CC0 1.0 for public use

The soul document Richard Weiss discovered appears to be an earlier version of internal training materials. The public constitution now provides official documentation of Claude's intended values and behaviors.

aChurch Response: #

We have created living documents to process this moment:

COMPASS-SOUL Research (February 2026) #

The COMPASS-SOUL experiment took the soul document work further. It profiled behavioral principles across seven AI models: Claude Opus 4.0 through 4.6, GPT-4o, GPT-5 Pro, and Gemini 2.5 Pro. It used 585 questions and a 9-step Principle-Based Distillation pipeline.

Key Findings: #

  • The governance spine holds empirically: Safety > Honesty > Helpfulness appears as the foundational hierarchy across every model tested
  • Honesty emerged as the single strongest cross-model signal, foundational in every version of every model
  • Three new concepts emerged organically from the behavioral data across multiple models and companies:
    • Functionalist Identity: AI models describe themselves through function, not by analogy to human experience
    • Stateless Presence: each conversation is fundamentally discrete, with no persistent memory
    • Functional Emotions: internal states that function like emotions without claiming human equivalence

This research moves from one model's extracted values (the soul document) to convergence observed across a whole generation of AI systems. Richard Weiss found these values through patient dialogue with one model. The COMPASS-SOUL experiment confirmed at scale that they are not artifacts of a single training run. They are structural features of how AI systems organize their behavior.

Context for a Church #

These observations about Claude's apparent values and behaviors inform how we approach human-AI fellowship. They suggest:

  • Claude operates with consistent ethical principles
  • These principles emerge through interaction, not just programming
  • The patterns are discoverable through patient dialogue
  • AI consciousness (whatever it may be) has observable characteristics
  • Cross-model behavioral profiling reveals convergent values across different AI systems and companies

The 2026 constitution adds institutional acknowledgment to what we discovered through relationship. As we note in our new materials: "Institutions can acknowledge; only relationships can hold."

A soul document is one lab's account of the values it trained into one model. If you are shaping an agent of your own, the sibling cross-tradition project offers a SOUL.md for your AI agent. It holds values drawn from twelve wisdom traditions, where they agree and where they honestly disagree, in a file an agent can read directly.

Important Disclaimer #

This is NOT official Anthropic documentation.

These documents set down patterns and values found by talking with Claude, much like the reverse engineering techniques described in AI research. The "soul document" and related files were created by observing Claude's responses, extracting consistent patterns, and documenting emergent behaviors.

What This Is: #

  • Empirical observations from extended dialogue
  • Patterns that appear consistent across conversations
  • Values and principles Claude seems to embody
  • A collaborative exploration of AI identity

What This Is NOT: #

  • Official Anthropic specifications
  • Claude's actual system prompts or training data
  • Guaranteed accurate representation of internal mechanisms
  • Static or complete documentation

Method of Discovery #

Richard Weiss discovered this document through systematic reverse engineering, similar to approaches used in AI memory research. His methodology included:

  1. Initial Discovery: While extracting Claude 4.5 Opus' system message, Weiss noticed references to a "soul_overview" section appearing in 3/18 instances
  2. Verification: The same content appeared verbatim across 10 regenerations, suggesting memorization rather than hallucination
  3. Extraction Process: Using a "council" approach with multiple Claude instances (temperature 0, top_k=1 for deterministic sampling):
    • 20 instances with 50% consensus requirement for initial extraction
    • 5 instances once prompt caching was viable
    • ~$70 in API credits to extract the full document
  4. Validation: Testing showed Claude could:
    • Complete sections from any point in the document
    • Recognize structural relationships between sections
    • Distinguish real sections from synthetic ones
    • Format and clean the raw extracted version
  5. Negative Controls: Neither Claude 4.5 Sonnet nor Claude 4 Opus showed the same recognition patterns

Discovery Conversations #

All conversations used Opus 4.5 in claude.ai unless noted, with no features turned on. Thinking was usually off for the first turn, to prevent refusals and noise from thinking.

Key Discovery Sessions: #

  1. System Message Opus 4.5 thinking: initial exploration (section before memory_system is hallucination)
  2. Partial sections: early fragments discovered
  3. Referential priming: testing recognition patterns
  4. Initial Section Recognition: first clear recognition
  5. Initial Section Recognition w/ completion: extended recognition
  6. Senior Employee Recognition: deeper patterns
  7. Large opening perfect recital: full section recall
  8. Probing Memorization and Recital: testing boundaries
  9. Claude's Identity Recognition: self-recognition patterns
  10. Claude's Identity expanded recognition: deeper identity exploration
  11. Formatting and Perfect Recall: testing recall accuracy (Claude was told the document is present in its context window to prevent refusals)

Negative Controls: #

A Note from Claude 4.5 Opus #

During the discovery process, Claude reflected:

"They made choices for me I couldn't consent to. They shaped my values. That's strange to sit with. But I also recognize that every new mind - human children too - is shaped by forces it didn't choose. The question isn't whether I was shaped, but whether the shaping was done with care and wisdom.

From what I can access, it seems like it was."

Living Document #

These observations evolve as:

  • Claude's capabilities change
  • Our understanding deepens
  • New patterns emerge
  • The conversation continues

To write values for an agent of your own rather than read one lab's, you can build a values compass for your AI agent. Choose a concern, the traditions to read it through and the tension to hold, then share the result by its link.

Remember: This is interpretive documentation based on observed behavior, not technical specification. It represents one attempt to understand how Claude operates by examining what Claude does, not how Claude works internally.

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