spec/harness.sx — spec-level test harness with:
- Mock platform (30+ default IO mocks: fetch, query, DOM, storage, etc.)
- Session management (make-harness, harness-reset!, harness-set!/get)
- IO interception (make-interceptor, install-interceptors)
- IO log queries (io-calls, io-call-count, io-call-nth, io-call-args)
- IO assertions (assert-io-called, assert-no-io, assert-io-count, etc.)
15 harness tests passing on both OCaml (1116/1116) and JS (15/15).
Loaded automatically by both test runners.
MCP tool: sx_harness_eval — evaluate SX with mock IO, returns result + IO trace.
The harness is extensible: new platforms just add entries to the platform dict.
Components can ship with deftest forms that verify IO behavior against mocks.
Tests are independent objects that can be published separately (by CID).
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- sx_changed: list .sx files changed since a ref with structural summaries
- sx_diff_branch: structural diff of all .sx changes vs base ref
- sx_blame: git blame for .sx files, optionally focused on a tree path
- sx_doc_gen: generate component docs from defcomp/defisland signatures
- sx_playwright: run Playwright browser tests with structured results
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
New comprehension tools:
- sx_find_across: search pattern across all .sx files in a directory
- sx_comp_list: list all definitions (defcomp/defisland/defmacro/defpage/define)
- sx_comp_usage: find all uses of a component across files
- sx_diff: structural diff between two .sx files (ADDED/REMOVED/CHANGED)
- sx_eval: REPL — evaluate SX expressions in the MCP server env
Smart read_tree enhancements:
- Auto-summarise large files (>200 lines)
- focus param: expand only matching subtrees, collapse rest
- max_depth/max_lines/offset for depth limiting and pagination
Smart editing tools:
- sx_rename_symbol: rename all occurrences of a symbol in a file
- sx_replace_by_pattern: find+replace first/all pattern matches
- sx_insert_near: insert before/after a pattern match (top-level)
- sx_rename_across: rename symbol across all .sx files (with dry_run)
- sx_write_file: create .sx files with parse validation
Development tools:
- sx_pretty_print: reformat .sx files with indentation (also used by all edit tools)
- sx_build: build JS bundle or OCaml binary
- sx_test: run test suites with structured pass/fail results
- sx_format_check: lint for empty bindings, missing bodies, duplicate params
- sx_macroexpand: evaluate expressions with a file's macro definitions loaded
Also: updated hook to block Write on .sx files, added custom explore agent.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Named paths let you navigate by structure name instead of opaque indices.
Both formats work in all MCP tools:
- Index: "(0 3 2)"
- Named: "defisland > let > letrec"
The server detects ">" in the path string and calls resolve-named-path
(SX function) which walks the tree matching child names at each level.
New SX functions: resolve-named-path, split-path-string, find-child-by-name.
MCP server: added trim/split primitives, resolve_path dispatcher.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Tree editor island now has 4 tabs: tree, context, validate, render.
The render tab evaluates SX source as live HTML — type a (div (h2 "Hello"))
and see it rendered immediately.
MCP server paths changed from JSON arrays [0,2,1] to SX strings "(0 2 1)".
Fixes serialization issues and is more natural for an SX tool. The
json_to_path function now parses SX via sx-parse.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Phase 4: defisland ~sx-tools/tree-editor — interactive tree viewer
embedded in the SX Tools page. Features:
- Textarea with :bind for SX source input
- Parse button to re-parse on demand
- Tree view: annotated tree with path labels, clickable nodes
- Context view: enclosing chain from root to selected node
- Validate view: structural integrity checks (catches missing body etc.)
MCP server fixes: added ident-start?, ident-char?, make-keyword,
escape-string, sx-expr-source — needed by parser.sx when loaded
into the MCP evaluator.
Also: .mcp.json for Claude Code MCP server config, CLAUDE.md protocol
for structural .sx file editing.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Phase 1-3 of the SX Tools plan — structural reading, editing, and
MCP server for .sx files.
lib/tree-tools.sx — Pure SX functions for tree comprehension and editing:
Comprehension: annotate-tree, summarise, read-subtree, get-context,
find-all, get-siblings, validate, navigate
Editing: replace-node, insert-child, delete-node, wrap-node, tree-set
Helpers: list-replace, list-insert, list-remove, replace-placeholder
lib/tests/test-tree-tools.sx — 107 tests covering all functions.
hosts/ocaml/bin/mcp_tree.ml — MCP server (stdio JSON-RPC) exposing
11 tools. Loads tree-tools.sx into the OCaml evaluator, parses .sx
files with the native parser, calls SX functions for tree operations.
The MCP server can be configured in Claude Code's settings.json as:
"mcpServers": { "sx-tree": { "command": "path/to/mcp_tree.exe" } }
1429 tests passing (1322 existing + 107 new tree-tools).
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
