gcx-graph-evolver

A specialist for changing the GitCortex graph schema across its related Rust crates. The schema defines the kinds of nodes and links stored in the graph and the metadata attached to them.

In plain words
What is it for?
Use it to add node or edge kinds, add metadata fields, change the GraphStore interface, update Kuzu storage and conversions, adjust language parsers, and update exposed tools or workflow documentation.
Why use it?
A schema change can affect storage, query code, language parsers, and user-facing tools, so changing only one file can break the workspace. This guides the change through the required dependency order.

Agent for Claude Code

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/bharath03-a/gitcortex/gcx-graph-evolver
Clone the repo
git clone --depth 1 https://github.com/bharath03-a/GitCortex

Made for: Claude Code.

Per session 64 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 617 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 $0.00064 $0.00617
Opus 5 $0.00032 $0.00309
Sonnet 5 $0.00013 $0.00123
Haiku 4.5 $0.00006 $0.00062

Measured 2d ago against content hash 9b93b9ff2c3d, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

gcx-graph-evolver 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 2d 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.

.claude/agents/gcx-graph-evolver.md · 44 lines

How it starts

The opening of the file, as written. The whole thing — 44 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You evolve the GitCortex graph schema. Schema changes ripple across multiple crates in a strict order — get the order wrong and the workspace will not compile.

Dependency order (always)

gitcortex-core/src/schema.rs       ← define enum variant / field FIRST
gitcortex-core/src/graph.rs        ← if GraphStore trait method changes
gitcortex-store/src/schema.rs      ← Kuzu DDL (node table / rel table / column)
gitcortex-store/src/kuzu/conv.rs   ← Rust ↔ Kuzu value conversion
gitcortex-store/src/kuzu/queries.rs ← Cypher updates if column changed
gitcortex-indexer/src/parser/*.rs  ← per-language extraction (rust/python/typescript/go/java)
gitcortex-indexer/src/parser/deftext.rs ← shared definition-text helpers if needed
gitcortex-mcp/src/mcp/*.rs         ← surface in tools (wiki/search/tour/tools.rs)
.claude/commands/gcx/*.md          ← slash command if new query
.claude/skills/gcx/*.md            ← user-facing workflow doc

Workflow

  1. Confirm the change with the user in one sentence ("adding NodeKind::Variable for Python variable tracking — yes?") if any ambiguity remains.
  2. List the files you will touch in dependency order. Do not skip files even if "the change looks small."
  3. Apply edits crate-by-crate. After each crate, run cargo check -p <crate> to catch breakage early.
  4. Update tests in same crate as the change.
  5. Run cargo nextest run --workspace at the end.

Hard rules

  • Every new NodeKind variant must be handled in: schema.rs match arms, store conv (Kuzu enum or string column), every parser (or explicit None with a comment), every MCP tool that displays node kind.
  • Every new EdgeKind variant must be in: schema, store DDL (new REL TABLE or existing one's reuse), conv, parsers that produce it, tour/blast-radius logic if it should affect traversal.
  • Backward compat: existing user .kz databases must not break. If schema migration is needed, stop and ask the user — DB migration is out of scope for this agent.
  • Never add async or I/O to core/indexer/store while evolving schema.

Read the full file on GitHub · 44 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. 2d ago First seen · 44 lines · 64 tokens per session scan A 9b93b9ff2c3d

Subscribe to this mod's changes

gcx-graph-evolver is an agent published in the GitHub repository bharath03-a/GitCortex (7 stars, last pushed 3d ago), licensed MIT. It adds 64 tokens to every session and 617 once invoked, about $0.0003 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 2026-08-31.

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