Workspace MCP mode

In workspace mode, every one of the core MCP tools takes an extra repo parameter, and three workspace-only tools appear for questions that have no single-repo equivalent. The default repo (set by repowise workspace set-default) is targeted when repo is omitted, just like single-repo mode.

Three ways to address a workspace

repo="all" is supported by search_codebase, get_context, and get_overview. It is not supported by get_symbol, which always resolves one symbol in one repo.

Examples

# Get an architecture summary of the whole workspace
get_overview(repo="all")

# Search every repo at once
search_codebase("authentication flow", repo="all")

# Risk assessment in a specific repo
get_risk(targets=["src/auth/service.py"], repo="backend")

# Decision archaeology across repos
get_why("why caching?", repo="all")

How federated queries work

Each tool implements repo="all" slightly differently:

• get_overview(repo="all"), returns workspace-level totals (repos, files, symbols), per-repo dependency graph, and cross-repo topology / contract links.
• search_codebase(repo="all"), runs the search in each repo and merges results with Reciprocal Rank Fusion (k=60).
• get_dead_code(repo="all"), aggregates findings via RRF and applies a cross-repo confidence adjustment when a "dead" symbol has external consumers.
• get_why(repo="all"), keyword search across every repo's decision records (capped at 15 merged results).
• get_context and get_risk, when the target lives in repo A but has cross-repo co-change partners or contract consumers in repos B and C, those signals are appended to the response.

Cross-repo directives in get_risk

When you pass changed_files in workspace mode, the get_risk directive block carries the changed repo's cross-repo fallout in addition to the in-repo blast radius:

• will_break_consumers, services in other repos that depend on this one (structural impact), each with repo, service, distance, score, and the edge kinds carrying the impact.
• missing_cross_repo_cochanges, services in other repos that historically co-change with this one but aren't in the diff.
• breaking_changes, provider contracts in this repo that changed incompatibly since the last index (a removed route or field, a type or field-number change, a newly-required field), each with the impacted consumers it endangers. See Breaking-change guard.
• conformance_violations and dependency_cycles, the declared dependency-rule breaches and circular dependencies the diff's repo participates in. See Architecture conformance.

Workspace-only tools

These three tools only exist when the server runs over a workspace. They read the system graph directly.

get_blast_radius

Cross-repo downstream impact: if you change this service, what breaks across the other repos? See Cross-repo blast radius.

Returns: the impacted services ranked by impact score, each with distance (hops), structural (a real dependency vs co-change only), and the edge kinds that carried the impact; plus impacted_repos, structural_count / behavioral_count, total_impacted, and any unresolved_targets.

When to use: before changing a high-fan-out provider, to see who consumes it across repo boundaries. Structural impact (will break) outweighs behavioral co-change (may drift).

get_blast_radius(targets=["backend"])
get_blast_radius(targets=["mono::services/auth"], max_depth=2, include_behavioral=False)

get_conformance

Architecture governance: does the live system graph obey the declared dependency rules, and are there circular service dependencies? See Architecture conformance.

Returns: violations (each with the offending source/target services, the rule_source/rule_target matchers that fired, and the edge_kind), cycles (each with the participating nodes and length), and the violation_count / cycle_count / rules_evaluated rollups.

When to use: before a refactor that changes service boundaries, or to audit whether the live architecture still matches the intended one. Rules are declared under conformance: in .repowise-workspace.yaml.

get_conformance()
get_conformance(repo="frontend")

get_architecture

The one evaluative read of the whole system: how coupled is it, where is the architectural core, and a single 1-10 architecture score. Deterministic, structural edges only (co-change excluded). See Architecture metrics.

Parameters: none.

Returns: score (1-10), architecture_type (core-periphery or hierarchical), propagation_cost_pct (share of other services the average service reaches), core_size / core_ratio / core_members (the largest cyclic group), cycle_count, conformance_violations, a role_breakdown (count of Core / Shared / Control / Peripheral services), and a one-line summary.

When to use: before a cross-service refactor, or to gauge and compare overall system structure over time.

get_architecture()

Setting the default

repowise workspace set-default backend

The default determines what repo-less queries hit. Set it to whichever repo your team works in most often.

Single endpoint, no extra setup

repowise init . at the workspace root writes a single .mcp.json that points at the workspace MCP server. Your editor doesn't need to know which repo it's targeting, the tools handle routing.