Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add elevanaltd/HestAI-MCP --skill build-philosophygit clone --depth 1 https://github.com/elevanaltd/HestAI-MCPWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/elevanaltd/hestai-mcp/build-philosophy)<a href="https://agentmods.dev/skills/elevanaltd/hestai-mcp/build-philosophy"><img src="https://agentmods.dev/badge/skills/elevanaltd/hestai-mcp/build-philosophy/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/elevanaltd/hestai-mcp/build-philosophy"><img src="https://agentmods.dev/badge/skills/elevanaltd/hestai-mcp/build-philosophy.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00034 | $0.01299 |
| Opus 5 | $0.00017 | $0.00649 |
| Sonnet 5 | $0.00007 | $0.00260 |
| Haiku 4.5 | $0.00003 | $0.00130 |
Grade B, and why
build-philosophy scanned grade B with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 10d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Unrestricted tool accessmediumExcessive agency
A wildcard tool grant or "run any command" leaves no least-privilege boundary at all.
allowed-tools: "*" How it starts
The opening of the file, as written. The whole thing — 154 lines — stays where its author put it; the contents beside it link to each section on GitHub.
===SKILL:BUILD_PHILOSOPHY=== META: TYPE::SKILL VERSION::"2.0" PURPOSE::"Comprehensive build philosophy framework preventing accumulative complexity" SOURCE::"Consolidated from ~/.claude/skills/build-execution/*.oct.md"
§1::SYSTEM_AWARENESS_MANDATE CORE_PRINCIPLE::"Code change → System ripple → Understand ripples BEFORE modification"
SYSTEM_THINKING::[ MAP_IMPACT::[ "Trace all imports/uses of changed code", "Follow data flow dependencies", "Identify shared state impacts", "Document ripple paths explicitly" ], LOCAL_CHANGE_SYSTEM_CONTEXT::"Simple edit can break distant components - think globally", LOCAL_OPTIMIZATION_DEGRADES::"Faster function ≠ better system if breaks caching", MINIMAL_CODE_SERVES::"Essential complexity serves users, accumulative serves maintenance burden" ]
MAINTAIN_LIVING_SYSTEM::"Not editing text files - every change affects production"
§2::MINIMAL_INTERVENTION_PRINCIPLE DEFINITION::[ ESSENTIAL::"Code serving measurable user value", ACCUMULATIVE::"Code adding maintenance burden without proportional user value" ]
DECISION::"Could we achieve same outcome with simpler means?"
PROCESS::"Remove components until UX degrades → identify break point → restore last essential → minimal achieved"
ENFORCEMENT::[ JUSTIFICATION::"User problem? Why not extend existing? Simplification test?", EVIDENCE::"What removed? Break point found? Minimal restoration done?", SIGNOFF::"Reviewer verifies minimality credible, no obvious bloat" ]
§3::PHILOSOPHY_FRAMEWORK UNDERSTAND_SHAPE_ACT::[ UNDERSTAND::[ "What is the user problem?", "System connections and dependencies?", "Core assumptions and invariants?", "WARNING: 'just try this', 'probably works', 'not sure how'" ], SHAPE::[ "Simplest solution satisfying requirements", "Obvious to future readers (6mo test)", "Easy test isolation", "Minimal coupling", "PATTERNS: proven>novel, simple>clever, explicit>implicit" ], ACT::[ "TDD: failing test first", "Implement minimal solution", "Refactor for essential simplification only", "Commit atomically", "SCOPE: requested ≠ while_here, one concern per commit" ] ]
WISDOM_PATH::[ BETWEEN::"Complexity labyrinth ← minimal effective → Oversimplification sea", AVOID_LABYRINTH::"Over-abstracted, premature generalization, unjustified patterns", AVOID_OVERSIMPLIFICATION::"Unjustified duplication, skipping necessary abstractions", MINIMAL_EFFECTIVE::[ "Just enough abstraction to prevent duplication", "Just enough flexibility to handle known variations", "Just enough structure to maintain coherence" ] ]
§4::DECISION_GATES BEFORE_CODE::[ "Is this solving a user problem?", "Can we extend existing components?", "Is this feature explicitly requested?", "Are we solving a problem that doesn't exist yet?", "IF accumulative → DON'T ADD" ]
BEFORE_ABSTRACTION::[ "Rule of Three: 1st concrete → 2nd copy → 3rd abstract", "Does it reduce cognitive load?", "Is it understandable without docs?", "Cost if requirements change?", "IF mysterious → KEEP CONCRETE" ]
BEFORE_OPTIMIZATION::[ "Is this a measured bottleneck?", "Have we profiled first?", "Is the gain measured?", "PROFILE FIRST → IF not measured → DON'T OPTIMIZE" ]
BEFORE_TESTS::[ "Does this test user-facing behavior?", "Does it validate component contract?", "Will it catch real bugs?", "Testing behavior not implementation?", "IF not user-facing → RECONSIDER" ]
BEFORE_REFACTOR::[ "Does this improve clarity?", "Does it reduce complexity?", "Are tests still green?", "Will it make future changes easier?", "SAFETY: small steps, test after each, revert if fail", "IF behavior changes → NOT REFACTORING, IT'S A FEATURE" ]
§5::PRACTICAL_EXAMPLES RIPPLE_MAP_EXAMPLE::[ CHANGE::"processUser(id) → processUser(user)", DIRECT::"10 files need to pass user object", INDIRECT::"Tests need fixtures not IDs, API needs hydration, caching changes", FLOW::"DB queries move to callers, N+1 risk emerges", OUTCOME::"Simple signature change → 20 files + performance testing + staged migration" ]
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 10d ago First seen · 154 lines · 34 tokens per session scan B 0d7d88813583
build-philosophy is a skill published in the GitHub repository elevanaltd/HestAI-MCP (0 stars, last pushed yesterday), licensed Apache-2.0. It adds 34 tokens to every session and 1,299 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it B with 1 finding (unrestricted tool access). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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