Claude/hermes mcp servers c dr8 b#2
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Always-on utility tools registered at startup — no YAML config needed.
Gives LLMs read-only access to a configurable files directory (default:
.playwright-mcp) so they can retrieve screenshots and snapshots produced
by package providers such as the Playwright MCP server.
New files
builtin_tools.py — list_files + get_file handlers; _safe_resolve
prevents path-traversal (../); encoding=auto/text/base64
Changes
config.py — FILES_DIR constant (MCPPROXY_FILES_DIR env var)
server.py — register_builtin_tools() called at startup before
YAML providers; exported for tests
Dockerfile — COPY builtin_tools.py
README.md — layout, intro, Part 9 tutorial, parameter tables
Tests (31 new, 175 total)
tests/test_builtin_tools.py — 26 tests: empty dir, file listing,
sorted entries, subdirectory drill-down, path-traversal rejection,
text/base64/auto encoding, PNG roundtrip, size reporting
tests/test_server.py — 5 tests: register_builtin_tools exports,
mcp.tool called twice, tool names, getfile requires path
https://claude.ai/code/session_016EMphWWMguzwVrfAYvJFSX
After the initial tool call + Ollama summary, the script now:
Step 10 — calls mcpproxy-listfiles (root of files dir, default
.playwright-mcp) and mcpproxy-getfile for every file found.
A single Python block handles both MCP calls with proper SSE
unwrapping and session-ID headers; arbitrary file names are
safe because Python manages the HTTP calls directly.
Step 11 — asks Ollama to summarise what was produced:
- text files (JSON snapshots, HTML, logs): contents included,
truncated at 4000 chars each
- binary files (PNG screenshots etc.): name + size noted,
base64 payload omitted from prompt
- errors: surfaced inline
- relates file contents back to the original tool call
If no files are found the extra steps are skipped cleanly.
https://claude.ai/code/session_016EMphWWMguzwVrfAYvJFSX
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