witan-core
Shared core for the two witan MCP servers — witan (dist witan-council,
mcp/servers/witan) and witan-code (mcp/servers/witan-code). It is the third
shared packages/ sibling alongside
agent-config-kit, wired into both servers via
a [tool.uv.sources] editable path (dev/CI) plus a published PyPI version range.
Why
The two servers were built copy-paste-and-diverge and carried an explicit "deliberately duplicated — no cross-package import" convention. As the shared surface grew, fixes had to be applied twice and silently drifted — including code that is contractually required to stay identical (the repo-key canonicalizer behind the cross-layer symbol join key; the pinned omnigraph binary version, kept in lockstep by a fragile Renovate custom manager).
witan-core deliberately reverses that convention. The full rationale, scope,
and per-extraction contracts live in
docs/design/witan-core-extraction-spec.md.
Invariant
witan_core imports neither witan nor witan_code. It is a leaf below
both, preserving the one-directional witan → witan_code optional-mount DAG
(witan mounts witan-code as witan code; witan-code never imports witan).
Dependencies
The base package is stdlib-only. Heavier concerns are gated behind extras so neither server pulls weight it doesn't use:
witan-core[cli]→cyclopts,rich(CLI scaffolding, styled installer output)witan-core[mcp]→fastmcp(MCP elicitation primitives)
What's here
Extracted so far (each deletes the duplicated copies from both servers):
_detach.popen_detached— cross-platform detached subprocess spawningomnigraph_install— the pinned-omnigraph-binary installer (single source of the version;richimported lazily)elicit— theconfirm/textMCP elicitation primitives (needs themcpextra; not re-exported from the package root)repo_key—normalise+find_git_config, the cross-layer repo-key canonicalizer, with a golden contract testtimeutil.now_isomaintenance— the throttled-optimize stamp/interval/due mechanicsomnigraph.OmnigraphClient— the omnigraph-CLI subprocess wrapper base (write lock, retry/repair, admission-cap backoff); each server subclasses it (witan addsapply_schema; witan-code adds branch ops + bulkload)config_file.load_toml— shared config.toml loading (WITAN_CONFIGenv var). Both servers read the same file, so one[targets.<name>]block can override both at once.target_config— the[targets.<name>]match/select logic:match_target(prioritymatch_paths>match_repos>match_hosts>match_orgs),parse_target_tables,to_list,local_project_path. Each server keeps its own typed target model (different override fields — witan'sserver/graph/token/…, witan-code'scode_dir) and calls into this shared matcher, which is structurally typed over just the fourmatch_*lists.
Still local to each server (intentionally): the CLI scaffolding — its extraction coordinates with the in-flight multi-user deployment work (see the spec).
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