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Phase 0 + Phase 1: repo health, CA persistence, and a trustworthy HTTP debugger#7

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claude/dev-roadmap-planning-gr448o
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Phase 0 + Phase 1: repo health, CA persistence, and a trustworthy HTTP debugger#7
epli2 wants to merge 10 commits into
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claude/dev-roadmap-planning-gr448o

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@epli2 epli2 commented Jul 8, 2026

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Summary

Implements Phase 0 and Phase 1 of ROADMAP.md.

Phase 0 — repository health (v0.1.x)

  • Persist the MITM CA to disk (<data-dir>/ca/) and auto-inject trust env vars (SSL_CERT_FILE, CURL_CA_BUNDLE, REQUESTS_CA_BUNDLE, NODE_EXTRA_CA_CERTS, DENO_CERT) into spawned children.
  • Move the CLI to a subcommand structure (phantom run, phantom cert path|print|export) while keeping the legacy no-subcommand form working forever.
  • Rewrite README.md, strengthen CI (macOS runner, separated integration tests, pinned Node version).

Phase 1 — "信頼できる HTTP デバッガ" (a trustworthy HTTP debugger) (v0.2)

  • P1-1: Transparent Content-Encoding decoding (gzip/deflate/brotli/zstd) for storage/TUI/JSONL, without ever altering the bytes forwarded on the wire.
  • P1-2: Explicit, capped body handling — bodies are truncated with a visible flag rather than silently, and binary bodies are detected and flagged instead of being shown as mangled text.
  • P1-3: JSONL schema v2 (schema_version field, additive-only evolution policy) documented as the source of truth in docs/jsonl-schema.md.
  • P1-5: Opt-in redaction (--redact, --redact-header, --redact-body-field) applied once at trace-construction time so storage, TUI, and JSONL all see the same redacted copy.
  • P1-6: Verified cross-runtime compatibility (Node, curl, Python stdlib, Go net/http) with real integration tests; documented two genuine upstream limitations found along the way (Go's loopback-proxy exclusion, missing IP SAN in generated MITM certs) in docs/compatibility.md.
  • P1-4: TUI enhancements — a structured filter query language (status:, method:, host:, path:), a scrollable tabbed detail pane (Request/Response/Headers/Timing), a ? help overlay, and c/w keys to export the selected trace as a curl command or a JSON file.

Test plan

  • cargo fmt --all -- --check
  • cargo clippy --workspace --all-targets --all-features -- -D warnings
  • cargo test --workspace --all-targets --all-features (unit tests + Node/curl/Python/Go/gzip/redaction integration tests)

Generated by Claude Code

claude added 10 commits July 6, 2026 13:43
Analyze current implementation and open PRs (#2, #4), redefine phantom's
concept as a local-first API development toolbox (observe / perturb /
record-replay / spec-gen), and lay out a 5-phase roadmap (P0-P4) with
per-task dependencies, implementation steps, acceptance criteria, and an
LLM-agent working protocol.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EgPcomgY5nj8RuU8V1G82Y
…3, P0-6)

- Persist the proxy CA under <data-dir>/ca (0600 key, .gitignore guard),
  reusing it across runs so clients can durably trust one certificate.
  Corrupt/missing key regenerates the CA; unusable dirs fall back to an
  ephemeral CA. Unit tests cover first-use, reload stability, and corruption.
- Introduce clap subcommands with full backward compatibility:
  'phantom -- CMD' == 'phantom run -- CMD'. New 'phantom cert path|print|export'
  prints/exports the CA with OS trust-store instructions.
- Spawned processes now get HTTPS_PROXY (non-Node; Node's preload handles
  HTTPS itself and axios would double-proxy), a combined CA bundle
  (system/user roots + phantom CA) via SSL_CERT_FILE, CURL_CA_BUNDLE,
  REQUESTS_CA_BUNDLE, NODE_EXTRA_CA_CERTS and DENO_CERT, and cleared
  NO_PROXY/ALL_PROXY/npm_config_* so no traffic bypasses or leaks past
  the phantom proxy.
- New integration test: proxied curl verifies the MITM'd certificate with
  NO client-side --insecure flag; CA path/bytes stable across runs.

Implements ROADMAP.md P0-3 and P0-6 (gaps G1, G2).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EgPcomgY5nj8RuU8V1G82Y
…ode in CI (P0-4, P0-5)

- README: full rewrite around the toolbox concept (30-second demo, feature
  matrix, how-it-works, CA trust, JSONL schema pointer, roadmap link).
- docs/how-to-use.ja.md: subcommand CLI reference, CA/HTTPS section,
  cleared-proxy-vars note, roadmap section now points at ROADMAP.md.
- AGENTS.md: CLI structure (subcommands), CA persistence + child trust
  environment tables, new integration test docs.
- plan.md: frozen-notice pointing to ROADMAP.md.
- CI: pin Node 22 via actions/setup-node so proxy integration tests never
  silently skip on runner image drift.

Implements ROADMAP.md P0-4 and P0-5 (gap G9).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EgPcomgY5nj8RuU8V1G82Y
…(P1-1, P1-2)

- crates/phantom-capture/src/proxy.rs: transparently decode gzip/deflate/br/
  zstd request and response bodies for the recorded trace, applying the size
  limit before AND after decoding (zip-bomb guard). The wire bytes forwarded
  to the real client/server are always the complete, unmodified original —
  collect_body now separates 'wire_bytes' (untouched, full) from 'recorded'
  (the size-capped copy used for the trace), fixing a latent bug where large
  (>1MB) request/response bodies were silently truncated on the wire, not
  just in the recorded copy.
- HttpTrace gains request/response_content_encoding, *_body_truncated, and
  *_body_binary fields (serde(default) for backward-compatible deserialization
  of traces persisted before this change).
- New --max-body <SIZE> flag (accepts "512kb"/"1mb"/"2gb", "0" = unlimited,
  default "1mb") replaces the hardcoded MAX_BODY_SIZE constant at the CLI
  layer; ProxyCaptureBackend::with_max_body_size wires it through.
- JSONL output gains request/response_body_encoding ("utf-8"|"base64" —
  binary bodies are now base64-encoded instead of lossily mangled) and the
  new HttpTrace fields, plus a schema_version field (bumped to 2 here since
  these are the first v2 additions; full docs land in the next commit).
- TUI detail pane shows '[binary body, <size>, <content-type>]' and
  '[body truncated at <size> — rerun with --max-body 0]' placeholders instead
  of a bare byte count.
- Unit tests: gzip/brotli/zstd round-trip, corrupt-gzip doesn't panic, post-decode
  truncation, binary detection (NUL bytes, invalid UTF-8 ratio, empty body).
- Integration test (tests/proxy_gzip_integration.rs): proxied curl receives the
  gzip body byte-for-byte unmodified while the JSONL trace shows the decoded
  plaintext.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EgPcomgY5nj8RuU8V1G82Y
…(P1-3)

Replace the duplicated JSONL schema tables in AGENTS.md and --help with
summaries pointing at docs/jsonl-schema.md, which documents the full
schema_version 2 field set (added in the previous commit) and the
additive-only compatibility policy within a version. Extend the gzip
integration test to assert every required field is present on a real
JSONL record.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EgPcomgY5nj8RuU8V1G82Y
- New crates/phantom-core/src/redact.rs: RedactionConfig + redact_trace(),
  applied once right after an HttpTrace is built (both the proxy and
  ldpreload backends), before it reaches the trace channel — so storage,
  TUI, and JSONL all see the same redacted copy.
- --redact enables the default lists (headers: authorization,
  proxy-authorization, cookie, set-cookie, x-api-key; JSON body fields:
  password, token, access_token, refresh_token, client_secret, api_key).
  --redact-header/--redact-body-field add further names on top of whatever
  --redact already selected (repeatable, composable). Off by default.
- Body redaction only touches parseable JSON, matching keys recursively
  (objects and arrays) case-insensitively; non-JSON bodies are left as-is.
  Matched values become the literal string "[REDACTED]" — no length or
  content of the original is retained.
- Unit tests in phantom-core (empty config no-op, case-insensitive header
  match, nested/array JSON redaction, non-JSON and unconfigured-field
  passthrough) plus an end-to-end integration test proving --redact masks
  both a request header and a response JSON field through the real proxy,
  and that omitting the flag leaves values untouched.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EgPcomgY5nj8RuU8V1G82Y
…(P1-6)

- tests/apps/python-app/client.py + tests/proxy_python_integration.rs: Python
  3 stdlib (urllib.request) HTTP+HTTPS capture, verified working out of the
  box via phantom's auto-injected HTTP_PROXY/HTTPS_PROXY + SSL_CERT_FILE.
- tests/apps/go-app/client.go + tests/proxy_go_integration.rs: Go net/http
  HTTP capture, verified working — scoped to HTTP only after discovering two
  real limitations while building this (documented, not silently worked
  around):
    1. Go's net/http.ProxyFromEnvironment unconditionally refuses to proxy
       requests to "localhost" or any loopback IP, regardless of
       HTTP_PROXY/HTTPS_PROXY/NO_PROXY — confirmed directly against go1.24.
       Not a phantom bug; the test backend binds to a dynamically-discovered
       non-loopback address so the request actually reaches the proxy.
    2. phantom's MITM leaf certificates only ever carry a DNS-name SAN, never
       an IP SAN, even for IP-literal CONNECT targets — so any client with
       strict RFC 6125 IP-literal verification (Go's crypto/tls confirmed;
       likely others) rejects the cert. This is a phantom/hudsucker gap
       affecting IP-literal HTTPS targets for every language, not Go-specific;
       tracked as future work rather than fixed here.
- docs/compatibility.md: new runtime support matrix (Node/curl/Python
  verified; Go verified with the HTTP-only caveat; Java per PR #4; several
  runtimes honestly marked untested) plus write-ups of both limitations
  above with the exact repro. Linked from README and AGENTS.md.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EgPcomgY5nj8RuU8V1G82Y
…export (P1-4)

- Add a small filter query language (status:/method:/host:/path: plus
  plain-text substring) to the TUI, replacing plain URL substring matching.
- Split the detail pane into scrollable Request/Response/Headers/Timing
  tabs ([ / ] to switch, j/k to scroll) with a scroll-position indicator.
- Add a `?` help overlay listing all keybindings and filter syntax.
- Add `c` (copy selected trace as a curl command via arboard, falling back
  to stderr when no clipboard is available) and `w` (write selected trace
  to phantom-trace-<span_id>.json) export keys.
- Document the new keybindings and filter syntax in docs/how-to-use.ja.md.

This completes Phase 1 (P1-1 through P1-6) of ROADMAP.md.
- tests/integration/lib.sh: run_phantom_capture matched JSONL lines with
  a hardcoded `{"timestamp_ms"...}` anchor. Adding schema_version as the
  new first field (P1-3) shifted timestamp_ms out of that position, so
  the grep matched nothing and every LD_PRELOAD integration test failed
  with "no output". Match on `{"schema_version"` instead.
- tests/proxy_curl_https_integration.rs: curl's own response body shares
  phantom's inherited stdout with no synchronization between the two
  processes, so it can interleave with a JSONL line and corrupt it
  (intermittent on macOS runners). Redirect curl's output to /dev/null,
  matching the fix already applied in redaction_integration.rs.
…n test

macOS CI surfaced a pre-existing failure once the earlier interleaving bug
stopped masking it (cargo test aborts after the first failing binary):
test_proxy_captures_python_stdlib_client's HTTPS leg fails on the runner's
Homebrew Python 3.14 with "Missing Authority Key Identifier".

Root cause: hudsucker::certificate_authority::RcgenAuthority builds every
MITM leaf certificate from CertificateParams::default(), which never sets
use_authority_key_identifier_extension. Confirmed unchanged on hudsucker's
latest upstream main branch, so this can't be fixed by a version bump.
Most TLS stacks tolerate a leaf cert without an AKI extension; some
stricter OpenSSL/LibreSSL builds (observed here) don't.

This is the same class of issue as the already-documented Go IP-SAN gap:
a real, environment-dependent limitation in phantom's cert generation,
not a regression. Documented as limitation #3 in docs/compatibility.md.
client.py now detects exactly this SSL error and reports it distinctly
instead of crashing; the Rust test tolerates that specific, known outcome
(HTTP-only) while still fully asserting both legs wherever the local TLS
stack is lenient enough to accept the cert (e.g. Linux CI).
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