Borrowing it
Nothing to install: this file belongs to paiml/rust-mcp-sdk. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/paiml/rust-mcp-sdk/main/.claude/skills/spike-findings-rust-mcp-sdk/SKILL.mdgit clone --depth 1 https://github.com/paiml/rust-mcp-sdkWrote 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/paiml/rust-mcp-sdk/spike-findings-rust-mcp-sdk)<a href="https://agentmods.dev/skills/paiml/rust-mcp-sdk/spike-findings-rust-mcp-sdk"><img src="https://agentmods.dev/badge/skills/paiml/rust-mcp-sdk/spike-findings-rust-mcp-sdk/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/paiml/rust-mcp-sdk/spike-findings-rust-mcp-sdk"><img src="https://agentmods.dev/badge/skills/paiml/rust-mcp-sdk/spike-findings-rust-mcp-sdk.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00107 | $0.05567 |
| Opus 5 | $0.00053 | $0.02783 |
| Sonnet 5 | $0.00021 | $0.01113 |
| Haiku 4.5 | $0.00011 | $0.00557 |
Grade A, and why
spike-findings-rust-mcp-sdk scanned grade A with 0 findings 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 6d 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.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 333 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Two complementary additions to the PMCP SDK, validated across two spike sessions:
Session 1 (2026-05-12, spikes 001-002): SEP-2640 Skills support.
Skills are rich, structured agent-workflow instructions discovered and
consumed via existing MCP resources/* primitives — no new RPC methods,
but two small additions to PMCP's protocol types are required. The DX
layer provides Skill / SkillReference / Skills types and a
bootstrap_skill_and_prompt(...) builder method that registers the same
skill data under both a SEP-2640 surface AND a fallback MCP prompt
surface, so hosts that don't yet support SEP-2640 still get the full
bootstrap context in one round-trip.
Session 2 (2026-05-17, spikes 003-006): Schema-server toolkit lift.
The pmcp-run service's three "built-in server" core crates (sql,
graphql, openapi) let server authors build a complete MCP server from a
schema file (SQL DDL / OpenAPI YAML / GraphQL SDL) plus a TOML config —
no Rust code required for curated tools. The lift promotes the already-
extracted proto-SDK (mcp-server-common, ~2.2k LoC) to a public PMCP
workspace crate, ships per-backend connector crates with multi-dialect
SQL support, AND ships a pmcp-config-helper MCP server with Type 2
SEP-2640 authoring Skills (consumed by end-users in their MCP client).
Session 3 (2026-09-01, spikes 008-011): Skills positioning.
With the skills feature shipped (src/server/skills.rs, examples
s44/c10), these spikes re-validated conformance against the CURRENT
SEP-2640 draft (rewritten 2026-08-29: skills/list + skills/get now
mandatory — the shipped module is non-conformant on the one thing it
declares) and settled how Skills relate to the SDK's two other
instruction-carrying mechanisms: prompts-as-workflows
(SequentialWorkflow) and pmcp-agent. Verdict: three points on one
execution-locus axis sharing one content type — the axis is WHERE
JUDGMENT RUNS. Skill is the canonical content primitive the other two
project to (workflow → skill) and consume from (agent ← pinned skill).
Alongside, composing — never instead.
Spike sessions wrapped: 2026-05-12, 2026-05-17, 2026-09-01.
What ships with it
47 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- references/schema-server-architecture.md 11 KB
- references/schema-server-authoring-skills.md 9.6 KB
- references/schema-server-sql-dialects.md 9.7 KB
- references/sep-2640-conformance.md 6.3 KB
- references/skills-dx-layer.md 13 KB
- references/skills-positioning-tri-surface.md 9.2 KB
- references/skills-wire-protocol.md 6.9 KB
- sources/001-skills-as-resources-mapping/Cargo.toml 579 B
- sources/001-skills-as-resources-mapping/README.md 9.3 KB
- sources/001-skills-as-resources-mapping/src/main.rs 14 KB
- sources/002-skill-ergonomics-pragmatic/Cargo.toml 358 B
- sources/002-skill-ergonomics-pragmatic/README.md 16 KB
- sources/002-skill-ergonomics-pragmatic/src/main.rs 33 KB
- sources/003-schema-server-surface-diff/ANALYSIS.md 10 KB
- sources/003-schema-server-surface-diff/Cargo.toml 672 B
- sources/003-schema-server-surface-diff/main.rs 22 KB
- sources/003-schema-server-surface-diff/README.md 9.2 KB
- sources/004-schema-server-thin-slice-sql/Cargo.toml 1.1 KB
- sources/004-schema-server-thin-slice-sql/config.toml 1.6 KB
- sources/004-schema-server-thin-slice-sql/main.rs 31 KB
- sources/004-schema-server-thin-slice-sql/README.md 14 KB
- sources/004-schema-server-thin-slice-sql/schema.sql 924 B
- sources/005-multi-dialect-sql-connector/Cargo.toml 1.1 KB
- sources/005-multi-dialect-sql-connector/config.toml 1.4 KB
- sources/005-multi-dialect-sql-connector/main.rs 39 KB
- sources/005-multi-dialect-sql-connector/README.md 10 KB
- sources/005-multi-dialect-sql-connector/schema.sql 775 B
- sources/006-authoring-skills-server/Cargo.toml 614 B
- sources/006-authoring-skills-server/README.md 8.9 KB
- sources/006-authoring-skills-server/skills/examples/employee-directory-sql.md 2.4 KB
- sources/006-authoring-skills-server/skills/references/code-mode-policy.md 1.9 KB
- sources/006-authoring-skills-server/skills/references/openapi-pareto-tools.md 2.0 KB
- sources/006-authoring-skills-server/skills/references/sql-pareto-tools.md 2.0 KB
- sources/006-authoring-skills-server/skills/SKILL.md 2.5 KB
- sources/006-authoring-skills-server/src/main.rs 14 KB
- sources/008-sep-2640-drift-check/Cargo.toml 745 B
- sources/008-sep-2640-drift-check/README.md 7.7 KB
- sources/008-sep-2640-drift-check/src/main.rs 18 KB
- sources/009-workflow-skill-projection/Cargo.toml 597 B
- sources/009-workflow-skill-projection/README.md 5.1 KB
- sources/009-workflow-skill-projection/src/main.rs 17 KB
- sources/010-agent-instructions-from-skills/Cargo.toml 722 B
- sources/010-agent-instructions-from-skills/README.md 5.2 KB
- sources/010-agent-instructions-from-skills/src/main.rs 14 KB
- sources/011-three-mechanisms-one-task/Cargo.toml 509 B
- sources/011-three-mechanisms-one-task/README.md 4.5 KB
- sources/011-three-mechanisms-one-task/src/main.rs 18 KB
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.
- 6d ago Changed · +106 lines · +19 tokens per session fbd6ad8ffa2e
- 11d ago First seen · 227 lines · 88 tokens per session scan A 77cc1662ac39
spike-findings-rust-mcp-sdk is a skill published in the GitHub repository paiml/rust-mcp-sdk (53 stars, last pushed 4d ago), licensed MIT. It adds 107 tokens to every session and 5,567 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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