reference

Reference instructions for handling errors from the Go code-quality server and explaining its diagnostic results.

In plain words
What is it for?
Interpreting tool failures, reading file and line diagnostics, and troubleshooting the Go lint, vulnerability, and nil-safety checks.
Why use it?
They provide the details needed when the shorter agent instructions do not cover a failure or remediation step.

Agent

Install

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.

agentmods
npx agentmods add agents/afshinator/mcp-server-go-quality/reference
Clone the repo
git clone --depth 1 https://github.com/afshinator/mcp-server-go-quality
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 2,134 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00000 $0.02134
Opus 5 $0.00000 $0.01067
Sonnet 5 $0.00000 $0.00427
Haiku 4.5 $0.00000 $0.00213

Measured yesterday against content hash dd28ef9e3c3d, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

reference 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 yesterday.

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.

docs/agents/reference.md · 209 lines

How it starts

The opening of the file, as written. The whole thing — 209 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Reference — mcp-server-go-quality

Detailed error handling, remediation, and troubleshooting. Load on demand when the compact AGENTS.md doesn't cover what you need.


Response schema

Diagnostic {
  tool:     "golangci-lint" | "govulncheck" | "nilaway"
  file:     string          // relative path from project root; "" if unknown
  line:     number          // 0 if unknown
  column:   number          // absent from JSON when 0 (omitempty)
  severity: "error" | "warning" | ""   // "" for govulncheck/nilaway; absent when empty
  message:  string          // human-readable summary
  error:    string          // "" on success; non-empty on tool failure
  native:   object          // full raw tool output; also populated for govulncheck parse error diagnostics as a JSON array of error strings
}

Error handling

Tool-level errors (in the Diagnostic array)

These appear as entries with a non-empty error field. Other tools' results are still present in the same response.

error value Meaning What to do
"Tool command failed with exit code N. Stderr: ..." Tool crashed or found a config problem Show stderr to user; check .golangci.yml or project config
"timed out after 5m0s" Tool exceeded per-tool deadline Increase timeout in .go-quality.yaml
"cancelled" Client disconnected while tool was running Safe to retry
"unexpected output format from <tool>..." Tool version mismatch with server's parser Run install_tools to reinstall the pinned version
"failed to parse govulncheck output: ..." govulncheck output had malformed lines Likely a govulncheck version issue; run install_tools. Inspect native for the raw parse error.

Fatal errors (JSON-RPC error, no Diagnostic array)

Error message Meaning What to do
"not a Go project: no go.mod or go.work found" No go.mod or go.work walking up from project_path Verify the path is inside a Go module
"config error: ..." .go-quality.yaml is malformed or unreadable Fix the YAML or delete the file to use defaults
"unknown tool: \"<value>\". valid values: golangci-lint, govulncheck, nilaway" Bad value in tools parameter Check the tools array for typos
"installing <tool>: ..." Tool installation failed Report to user; try running go install <path>@<version> manually
"...resolving Go binary directory..." go is not on PATH The Go toolchain must be installed separately; the server will not start

Read the full file on GitHub · 209 lines

Changes

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.

  1. yesterday First seen · 209 lines · 0 tokens per session scan A dd28ef9e3c3d

Subscribe to this mod's changes

reference is an agent published in the GitHub repository afshinator/mcp-server-go-quality (0 stars, last pushed 1mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 2,134 tokens. 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 2026-08-31.

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