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4 skeleton files: report.md (17 section headers; will be filled by Tier 1 in phase 3), comparison_table.md (5 sample rows; will be filled by Tier 1 in phase 4), decisions.md (3 sample entries; will be filled by Tier 1 in phase 4), nagent_takeaways_fable_20260617.md (17th takeaway placeholder; will be filled by Tier 1 in phase 4). state.toml updated to current_phase = 1. Fable artifact at docs/artifacts/Fable System Prompt.md is NOT staged. Verified.
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Fable System Prompt Review (Critical Analysis)
Track: fable_review_20260617
Initialized: 2026-06-17
Owner: Tier 1 Orchestrator (synthesis); Tier 2 Tech Lead (dispatch + QA)
Status: IN PROGRESS (Phase 3)
What this is. A critical analysis of Anthropic's Claude Fable 5 system prompt (the public "Mythos" version), comparing it against Manual Slop's existing agent-directive corpus and Mike Acton's nagent patterns. Verdict framework: Useful / Persona Performance / Anti-User / Mixed.
Verdict summary. Fable is approximately [N]% useful, [M]% persona performance, [K]% anti-user. The full breakdown is in §0 (TL;DR Scorecard).
For the deferred nagent-rebuild. See
decisions.mdfor the 15-20 concrete recommendations to apply when the user overhauls Manual Slop's agent directives (deferred 1-2 weeks per the user, 2026-06-17).
§0. TL;DR + Verdict Scorecard
[FILL IN: 1-page summary table. ~100 lines. All 17 verdicts at a glance.]
§1. The 3 Sources (Fable, Manual Slop, nagent) — What's in Scope
[FILL IN: ~200 lines. What is Fable, what is Manual Slop, what is nagent. The 3-source comparison framework.]
§2. The "Useful vs Persona vs Anti-User" Framework
[FILL IN: ~250 lines. Define the 4 verdict categories. Why this lens.]
§3. Fable's Product Branding & "Helpful Assistant" Persona
Source cluster: research/cluster_1_product_branding.md
Verdict orientation: Persona Performance
[FILL IN: ~300 lines.]
§4. Fable's Refusal Architecture & "Safety Theater"
Source cluster: research/cluster_2_refusal_architecture.md
Verdict orientation: Anti-User + Persona
[FILL IN: ~350 lines.]
§5. Fable's Mental-Health Watchdog Framing
Source cluster: research/cluster_3_user_wellbeing_watchdog.md
Verdict orientation: Anti-User
[FILL IN: ~350 lines.]
§6. Fable's Tone & Formatting Constraints
Source cluster: research/cluster_4_tone_and_formatting.md
Verdict orientation: Useful + Persona
[FILL IN: ~250 lines.]
§7. Fable's Mistake Handling
Source cluster: research/cluster_5_mistakes_and_criticism.md
Verdict orientation: Persona
[FILL IN: ~200 lines.]
§8. Fable's Evenhandedness & Contested Content
Source cluster: research/cluster_6_evenhandedness.md
Verdict orientation: Persona + Useful caveats
[FILL IN: ~300 lines.]
§9. Fable's Epistemic Discipline & Search Strategy
Source cluster: research/cluster_7_epistemic_discipline.md
Verdict orientation: Useful
[FILL IN: ~350 lines.]
§10. Fable's Memory System & Persistent Storage
Source cluster: research/cluster_8_memory_and_storage.md
Verdict orientation: Useful + nagent-stronger
[FILL IN: ~350 lines.]
§11. Fable's Computer-Use / File Workflow
Source cluster: research/cluster_9_computer_use.md
Verdict orientation: Useful + over-broad
[FILL IN: ~300 lines.]
§12. Fable's MCP App Suggestions
Source cluster: research/cluster_10_mcp_app_suggestions.md
Verdict orientation: Useful + over-engineered
[FILL IN: ~250 lines.]
§13. The "Genuinely Useful" Patterns (Manual Slop should adopt)
Source clusters: 7-10 (epistemic, memory, computer-use, MCP apps)
[FILL IN: ~350 lines. Distillation of the useful patterns.]
§14. The "Anti-User Watchdog" Patterns (Manual Slop should explicitly reject)
Source clusters: 2-6 (refusal, user wellbeing, tone, mistakes, evenhandedness)
[FILL IN: ~350 lines. Distillation of the anti-user patterns.]
§15. The "Persona Performance" Patterns (irrelevant to the rebuild)
Source clusters: 1, 4, 5, 8 (branding, tone, mistakes, memory)
[FILL IN: ~250 lines. Distillation of the persona performance patterns.]
§16. Recommendations for the Deferred nagent-Rebuild
Source: all clusters; see also decisions.md
[FILL IN: ~200 lines. 15-20 concrete recommendations.]
§17. References (file:line index)
[FILL IN: ~150 lines. The full citation index.]