Go repository intelligence for Claude Code. Use when reading, navigating, editing, reviewing, or refactoring a Go codebase. Adds AST-aware call graphs, blast-radius analysis, impact and security-flow candidates, and 61 query, analysis, and workflow capabilities through the local gograph MCP server.
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Go repository intelligence for Claude Code. Use when reading, navigating, editing, reviewing, or refactoring a Go codebase. Adds AST-aware call graphs, blast-radius analysis, impact and security-flow candidates, and 61 query, analysis, and workflow capabilities through the local gograph MCP server.
argument-hint
gograph stats | gograph plan UserService.Login | gograph review --uncommitted
allowed-tools
Bash, Read
homepage
https://gograph.identuum.ai
repository
https://github.com/ozgurcd/gograph
author
ozgurcd
license
MIT
user-invocable
true
gograph: Go Repository Intelligence
gograph is a local, AST-aware Go code intelligence engine that exposes 61 query, analysis, and workflow capabilities over the Model Context Protocol (65 endpoints including session lifecycle). It gives terminal LLMs (Claude Code, Cursor agents, OpenClaw) a structural view backed by a persisted or in-memory graph. gograph_context combines evidence that may otherwise require several navigation and source calls; actual savings depend on the task.
gopls provides live compiler-backed navigation, diagnostics, implementations,
refactoring, and experimental MCP support. gograph complements it with a
persisted repository graph, composed change-analysis workflows, and policy
gates for coding agents.
When to invoke this skill
Activate whenever the user is working in a Go repository:
Reading code, asking what a function does, or tracing a behavior across files.
Planning, editing, refactoring, or deleting any Go symbol (function, method, struct, interface, package).
Reviewing a Go diff or unstaged changes.
Hunting a bug, auditing for security issues, or measuring complexity / coupling.
If a .go file is in the CWD or the user mentions a Go symbol, type, package, or interface by name, the skill applies.
Do NOT invoke for non-Go work. The skill is Go-scoped.
Prerequisite
The gograph binary must be installed and on $PATH:
go install github.com/ozgurcd/gograph/cmd/gograph@latest
Verify with gograph --version. The marketplace plugin supplies this workflow
guidance; it does not install the binary or register an MCP server. Register
gograph mcp <project-path> for each project using the client's MCP setup.
Packaged and generated registrations keep refresh persistence off by default.
Mandatory workflow (enforced)
At the start of any Go coding session, invoke gograph_capabilities to confirm what the connected server exposes.
Confirm graph health before symbol queries. MCP creates an in-memory AST
graph when the artifact is missing, unreadable, unsafe, or has an unsupported
source-policy marker, and refreshes source analysis per call. Invoke
gograph_stats with no parameters and require build_status=complete; a
build with zero successful parses never replaces the previous graph, while
partial failures are reported explicitly. When durable precise enrichment
is needed, run CLI ; if compilation prevents it,
use CLI and explain the fallback.
gograph build . --precise
gograph build .
For structural symbol / type / function discovery, use gograph_query instead of grep, rg, find, or glob. Text search also matches comments and string literals; gograph_query returns AST-derived matches. Continue to use text search for literal strings, documentation, ordinary non-sensitive configuration, and non-Go files.
Before editing any Go symbol, invoke gograph_plan with
symbol=<symbol>. The plan returns callers, tests connected to the symbol,
and a blast-radius estimate. Edit decisions should reference the plan.
To understand a function or method, invoke gograph_context with
symbol=<symbol>. This single call combines node + source + callers +
callees + statically mapped tests; inspect source or gopls when the
evidence is incomplete.
After editing Go code, invoke gograph_review with uncommitted=true;
MCP refreshes source analysis before the review. If the task requires a
durable precise artifact for later CLI or server processes, run CLI
gograph build . --precise first. Run the repository's required tests and
checks separately.
High-value tools
Tool
Use case
gograph_capabilities
Discover what the connected server exposes
gograph_query with term=<term> or terms=[...]
AST-derived structural symbol search
gograph_context with symbol=<symbol>
Node + source + callers + callees + tests in one call
gograph_plan with symbol=<symbol>
Pre-edit blast radius + callers + tests
gograph_review with uncommitted=true
Post-edit coverage check
gograph_impact with symbol=<symbol>
What breaks if this changes
gograph_callers / gograph_callees with function=<symbol>
Explicit call-graph traversal
gograph_implementers with interface=<interface>
All types implementing an interface
gograph_routes
HTTP route discovery across handler / service / repository layers
gograph_sql
SQL query inventory across the codebase
gograph_complexity
Cyclomatic complexity per function
gograph_godobj
God-object detection
gograph_coupling
Package coupling / instability scores
gograph_diagram
Mermaid architecture diagrams
gograph_errors with optional term=<term>
Error inventory
gograph_errorflow with query=<term>
Error propagation paths
gograph_flow
Potential HTTP/JSON/env paths to SQL, process, filesystem, and outbound HTTP sinks
gograph_changes
Diff source against the trusted persisted graph, or MCP startup fallback when no usable artifact exists
gograph_tests with optional symbol=<symbol>
Tests connected to a symbol
gograph_check
Policy checks, including changed-route tests, coverage, orphans, API drift, arity, and complexity
The live surface is 65 MCP endpoints; gograph_capabilities is the tested source of truth. gograph_flow is path-insensitive with bounded call-site matching; use it for security review leads, not exploitability proof.
For gograph_callers, gograph_callees, gograph_impact,
gograph_endpoint, gograph_dependents, gograph_deps, gograph_path, and
gograph_coupling, set mermaid=true to request Markdown-fenced Mermaid
instead of the tool's normal response.
Privacy
Graph artifacts and MCP transport are local. Indexing asks the installed Go
toolchain for effective build/module context; precise mode additionally
type-loads packages, and doc runs go doc. These operations follow the
configured module-cache and network policy and remain open-world. Indexing reads Go
source and ordinary project/gograph metadata; it does not intentionally scan
.env, key, certificate, kubeconfig, tfstate, or credential files. It respects
.gitignore and skips AI-agent worktree directories automatically. See
PRIVACY.md in the gograph repo for details.
Descendant symlinks and special files for recognized Go build inputs are
excluded. AST and graph-directed source reads are confined to regular files beneath the analyzed repository;
an explicitly symlinked repository root remains supported. Persisted
graph.json must also be a regular repository-confined file, and publication
refuses a linked or non-directory .gograph and linked/non-regular lock files.
The automatic .gitignore update rejects links rather than modifying their
targets. Linked/non-regular go.mod, go.sum, go.work, go.work.sum, and
vendor/modules.txt metadata is rejected before gograph or the Go toolchain
reads it. Applicable go.work use members must remain beneath the workspace
directory, and each member directory, go.mod, and optional go.sum is
validated before cmd/go. A persisted graph with a missing
or unsupported source-policy marker must be rebuilt before graph-backed tools
use it, and its serialized root is ignored. Saved .json baselines for
gograph_api and gograph_check must be regular, non-linked files inside the
selected project with the exact current marker; their serialized roots are
also ignored. Use the current binary for untrusted repositories. Precise
repository package loading and go doc are refused when source/metadata-link
validation fails; their preflight rejects source-tree links without following
targets that cmd/go may inspect across the selected root plus its effective
module root, or the workspace root and member trees; .git and
.gograph are excluded from that walk. doc also rejects filesystem-shaped queries.
Most MCP tools are read-only. Boundary creation writes configuration, session
create/end mutate telemetry, session cleanup deletes stale logs, and
gograph_wiki writes documentation; their MCP annotations declare those
effects. Repository-controlled session, snapshot, boundary, gate-init, and
relative wiki paths use rooted regular-file operations and reject linked path
components. Absolute wiki output is an explicit local destination whose
generated descendants remain confined beneath its real directory.
An operator can opt into durable MCP refreshes with
gograph mcp [path] --persist-refresh. After a successful refresh this writes
or overwrites .gograph/graph.json and the nine reports, without modifying
.gitignore. Refresh-capable tools then advertise that they may write. A
publication failure during a tool-triggered refresh is a tool error and is
retried on a later refresh-capable call without rebuilding the fresh in-memory
graph. If startup must auto-build, failure to publish prevents the server from
starting. A failed precise retry retains an already-fresh successful precise
artifact for the same sources. The artifact is the latest state only, not a
branch cache. Because default gograph_changes compares the working tree with
the persisted graph,
a successful publication also advances that comparison baseline. Reports are
replaced first and graph.json is replaced last as the publication marker.
Same-directory replacement is atomic on Unix-like systems but is not guaranteed
atomic by Go on non-Unix platforms; the complete ten-file bundle is not one
atomic transaction, and .artifacts.lock remains as separate operational state.
Anti-patterns
Treating text search or gograph as universally authoritative. Use gograph
first for supported structural queries; use gopls or targeted source/text
search when precision is AST/fallback, results are ambiguous, or a known call
is missing. Use text search directly for literals, comments, generated or
non-indexed files, and non-Go content.
Editing a Go function without gograph_plan first. This can miss relevant callers and downstream tests.
Skipping gograph_review with uncommitted=true after a multi-file change
and therefore missing a useful static review signal.
Repeating broad source reads when gograph_context with symbol=<symbol> can provide a
focused structural starting point.
Assuming MCP refreshes are durable, or that --persist-refresh caches branch
history. Default registrations refresh only in memory, and the opt-in mode
keeps one latest artifact set.
Why this exists
Coding agents often need a symbol's source, callers, callees, tests, and role at
the same time. gograph_context combines that indexed evidence in one response.
Measure tool calls, actual model tokens, false positives, false negatives, and
task success on your own repository; gograph output remains static-analysis
evidence rather than runtime proof.
