--- name: codespaces description: > Query `.belief_map.sexp` before non-trivial code changes to find module boundaries, dependencies, blast radius, and the minimal files to read. Use for architecture discovery, impact analysis, and boundary checks. --- # Codespaces -- Belief Map Architecture Discovery Query `.belief_map.sexp` to discover modules, boundaries, and dependencies before reading source files. Never read code blindly -- query the graph first. ## Scripts This skill bundles Python scripts. Resolve the skill and target roots before running them so the scanned project is always explicit: - `scripts/belief_search.py` -- query the belief map graph - `scripts/build_belief_map.py` -- generate the belief map from source - `scripts/build_infra_topology.py` -- extract Kustomize, Helm, and Terraform topology facts - `scripts/git_descendants.py` -- find all commits descending from HEAD (or a given ref) Never use project-local copies of these scripts -- they may be outdated and output JSON instead of sexp. ## Prerequisite Locate the belief map. If absent, build it: ```bash ls .belief_map.sexp belief_map.sexp 2>/dev/null SKILL_ROOT="$(pwd -P)" TARGET_ROOT="$(cd /absolute/path/to/project && pwd -P)" python3 -m pip install -r "$SKILL_ROOT/requirements.txt" python3 "$SKILL_ROOT/scripts/build_belief_map.py" --root "$TARGET_ROOT" python3 "$SKILL_ROOT/scripts/build_belief_map.py" --root "$TARGET_ROOT" --full ``` ## Mandatory Workflow: Query Before Code For non-trivial code work, run a belief-map query before `rg`, `find`, `sed`, `cat`, `nl`, opening directories, or reading source files. The skill only helps when it is used as the first scoping step, not as confirmation after source has already been inspected. **Fast first pass when the task has a clear keyword:** ```bash python3 scripts/belief_search.py quick "keyword" ``` `quick` searches for the first matching module and immediately runs `analyze`. Use it to get boundary files, dependencies, reverse dependencies, layers, and violations in one step. If `quick` returns the wrong module or no match, use the explicit `search` -> `analyze` flow below. **Step 1 -- Find the module ID:** ```bash python3 scripts/belief_search.py search "keyword" python3 scripts/belief_search.py entity EntityName ``` Use `search` or `entity` to locate the module ID. Module IDs are **full relative paths** like `pki-service/src/modules/ca/ca.service`, not short codes like `ps34`. The belief map may contain short path-map IDs internally, but they are resolved automatically -- always pass human-readable path-like strings. Do NOT guess or invent module IDs -- always confirm with `search` first. **Step 2 -- Analyze the module (do this IMMEDIATELY, not optionally):** ```bash python3 scripts/belief_search.py analyze ``` `analyze` is the PRIMARY command. It returns the full context: boundary files, dependencies, reverse dependencies, architecture layer, and violations. Always run it before reading any source. **Step 3 -- Read only the boundary files listed in the analyze output.** **Step 4 -- Do NOT read entire directories.** If the boundary shows 2-3 relevant files, read only those files. Ignore everything else in the directory. ## Command Reference | Command | Purpose | Example | |---|---|---| | `search ""` | Safe literal/`.*` search on graph | `search "operative.*service"` | | `analyze ` | Full module analysis (PRIMARY command) | `analyze drive/modules/drive/drive_schema` | | `quick ` | Search + analyze first match (shortcut) | `quick operatives` | | `boundary ` | Files to read for a change | `boundary operatives.service` | | `boundary --files-only` | File paths only (compact) | `boundary operatives.service --files-only` | | `entity ` | Find definitions + references | `entity DrivePath` | | `deps [depth]` | Outgoing dependency tree | `deps operatives.service 3` | | `rdeps [depth]` | Blast radius (who depends on this) | `rdeps drive_schema 2` | | `flow ` | Trace call/data flow | `flow drive_api fetchFiles` | | `module ` | Single module with edges | `module operatives.controller` | | `boundaries [id\|all]` | Check architecture violations | `boundaries all` | | `invariants [id\|all]` | Check naming convention violations | `invariants all` | | `layers` | Show all modules by layer | `layers` | | `find_function ` | Find function/method definitions | `find_function createOrder` | | `find_type ` | Find type/class/ifc/enum definitions | `find_type DriveDbCommitResponse` | | `find_callchain [depth]` | Trace call path between functions | `find_callchain createOrder processPayment` | | `find_callers [depth]` | Who calls this function | `find_callers handleRequest 3` | | `find_calls [depth]` | What does this function call | `find_calls createOrder 2` | | `grep_functions ` | Search function bodies in source | `grep_functions "validate.*input"` | | `diff_functions [ref]` | Changed functions in git diff | `diff_functions HEAD~3` | | `query ''` | Composable Scheme query | `query '(count (boundary "X"))'` | | `repl` | Interactive Scheme REPL | `repl` | ## Quick Reference: rg Queries When you need fast, targeted lookups without invoking the Python script, query the belief map directly with `rg`. The bundled builder writes `.belief_map.sexp`; if a repo still uses the legacy `belief_map.sexp`, substitute that filename in the commands below: ```bash # All facts about a module rg 'drive/modules/drive_db/api ' .belief_map.sexp # Who imports a module rg 'imports .* drive/modules/commons/result' .belief_map.sexp # What does a module import rg 'imports drive/modules/drive_db/api' .belief_map.sexp # All references to an entity rg 'DriveDbCommitResponse' .belief_map.sexp # All classes in a repo rg '^\(cls drive/' .belief_map.sexp # Data flow edges rg 'data-flow' .belief_map.sexp ``` These one-liners are useful for quick checks. For structured output and full analysis, use the Python script commands. ## Output Notation All output is S-expression facts, one per line. See [references/sexp-notation.md](references/sexp-notation.md) for the full format. Key patterns: ```scheme (boundary :lang py :file :purpose "") (boundary-dep :lang ts :file :relation imports) (boundary-rdep :lang tsx :file :relation imports) (boundary-summary :total 10 :deps 7 :rdeps 2) (entity-def cls :lang py :file ) (violation :src-layer domain :tgt-layer api :via imports :lang ts "") (result ) (result-count 42) ``` **`:lang` values**: `py` = Python (snake_case), `ts` = TypeScript (camelCase), `tsx` = TSX (PascalCase). ## Scheme Query Language Compose queries for complex analysis. See [references/scheme-queries.md](references/scheme-queries.md) for full reference. **Essentials:** ```scheme (boundary "id") ; target + deps + rdeps (change boundary) (entity "Name") ; modules defining entity (deps "id" depth) ; outgoing dependencies (rdeps "id" depth) ; reverse dependencies (find-function "name") ; modules with matching function defs (find-type "name") ; modules with matching type defs (find-callers "fn" depth) ; modules calling a function (find-calls "fn" depth) ; modules a function calls (intersect A B) ; set intersection (filter SET "pattern") ; safe literal/.* filter (files SET) ; resolve to file paths (count SET) ; count members (violations) ; modules with boundary violations (layer "id") ; architecture layer of a module ``` ## Analysis Plan Pattern Before modifying code, compose a plan from queries: ```scheme ; 1. Scope (boundary "operatives.service") (count (boundary "operatives.service")) ; 2. Architecture constraints (violations "operatives.service") (layer "operatives.service") ; 3. Cross-language boundaries (filter (refs-to "DrivePath") "app-service") ; 4. Narrow to actionable files (filter (boundary "operatives.service") "dto") (intersect (deps "controller" 2) (deps "service" 2)) ; 5. After changes: verify (violations "operatives.service") ``` ## Trigger Examples Use this skill before reading source for: - Root-cause investigations that mention services, APIs, jobs, events, UI flows, or failing behavior. - Cross-service or cross-module questions, including "how does X call Y?" and "where is this stored?" - Redmine clarification when the answer depends on code behavior. - Architecture reviews, impact analysis, public contract changes, or blast-radius checks. - Reviews of non-trivial staged changes when dependency direction or module ownership matters. Do not force it for commit-only tasks, git-log summaries, manual demo/server runs, pure browser testing, or session-log analysis. ## Error Recovery If a command returns `(error no-match ...)`: 1. Do NOT retry with the same ID or guess another ID 2. Run `search` with a broader keyword to find the correct module ID 3. Use the `:suggestions` field if present -- it lists similar module IDs ```bash # Wrong: guessing IDs python3 scripts/belief_search.py analyze ps34 # fails: ps34 is a short path-map ID python3 scripts/belief_search.py analyze ca.service # fails: incomplete path # Right: search first, then use the full path from results python3 scripts/belief_search.py search "ca.*service" # Output shows: pki-service/src/modules/ca/ca.service python3 scripts/belief_search.py analyze pki-service/src/modules/ca/ca.service ``` ## Anti-patterns - **Guessing module IDs.** Module IDs are full relative paths (e.g., `pki-service/src/modules/ca/ca.service`). Short codes like `ps34` are internal path-map IDs and must not be used directly. Always `search` first. - **Build but never query.** Building the belief map and then never running `search`, `analyze`, or `boundary` provides zero value. - **Querying after reading source.** The first source-code read should come from `boundary-file` lines in `analyze` output. - **Reading `.belief_map.sexp` as a whole file.** Use `search`, `analyze`, or `rg` to query specific facts. - **Skipping the belief map for cross-module tasks.** Always query the graph to understand boundaries before reading source files. - **Reading all files in a directory.** When the boundary shows 2-3 files, read only those. - **Using project-local scripts.** Always use this skill's bundled scripts. Project copies may output JSON instead of sexp. ## Rebuilding the Graph ```bash python3 "$SKILL_ROOT/scripts/build_belief_map.py" --root "$TARGET_ROOT" python3 "$SKILL_ROOT/scripts/build_belief_map.py" --root "$TARGET_ROOT" --full python3 "$SKILL_ROOT/scripts/build_belief_map.py" --root "$TARGET_ROOT" --lsp python3 "$SKILL_ROOT/scripts/build_belief_map.py" \ --root "$TARGET_ROOT" --output "$TARGET_ROOT/custom-map.sexp" ``` Rebuild after structural changes (add/remove files, change imports, add classes). Search patterns support literals, `.*`, boundary `^`/`$` anchors, and backslash escapes. Other regex operators are rejected. The TypeScript AST contract covers TS/TSX imports and re-exports, literal `import()`/`require()`, `import = require()`, literal template imports, emitted `.js`/`.jsx` specifiers, project-scoped path aliases, and conventional exact self-imports. It does not promise inherited `tsconfig` aliases, `baseUrl`-only resolution, package `source`/`exports`, or self-package export subpaths. ## Infrastructure Topology Extract service topology from Kustomize, Helm, and Terraform files. This script requires `PyYAML` (`pip3 install pyyaml`). ```bash python3 scripts/build_infra_topology.py # auto-detect all IaC python3 scripts/build_infra_topology.py --kustomize . # kustomize only python3 scripts/build_infra_topology.py --helm ./charts # helm charts only python3 scripts/build_infra_topology.py --terraform ./infra # terraform only python3 scripts/build_infra_topology.py --append .belief_map.sexp # merge into graph ``` Emits `infra-node`, `k8s-depends`, `k8s-service`, `helm-depends`, `tf-depends`, and `infra-maps` edges. Query with: ```bash rg 'infra-node' .belief_map.sexp # all services rg 'k8s-depends' .belief_map.sexp # service dependencies rg 'infra-node.*:component database' .belief_map.sexp # all databases rg 'infra-maps.*app-service' .belief_map.sexp # infra -> source code mapping ```