docs(tasks): write up rtk curl TTY-passthrough upstream issue

Document that `rtk curl` (and siblings `cat`, `read`, `json`, etc.)
emits the compressed/schema representation even when stdout is piped,
silently breaking any downstream parser (jq, python json.load, awk).
Proposes an isatty(stdout) check to passthrough raw bytes when not
a TTY, matching the Unix convention used by ls/grep/diff.

Co-Authored-By: Claude <noreply@anthropic.com>

tasks/rtk-upstream-issue.md

@@ -0,0 +1,85 @@
+# `rtk curl` breaks downstream parsers by returning compressed schema instead of raw payload when stdout is piped
+
+## Summary
+
+`rtk curl` always returns a token-compressed, schema-like representation of the response body, regardless of whether stdout is a TTY or a pipe. This silently breaks any command that pipes `rtk curl` into a parser expecting the raw payload (`python -c "json.load(sys.stdin)"`, `jq`, `node -e`, `awk`, `sed`, etc.).
+
+Because the Claude Code hook (`rtk-rewrite.sh`) auto-rewrites `curl` → `rtk curl`, this affects every such pipeline the LLM constructs — even though the LLM never sees the rtk-compressed output, only the downstream parser error.
+
+## Reproduction
+
+```bash
+# Expected: prints "Hello World"
+curl -s "https://api.mymemory.translated.net/get?q=Bonjour%20monde&langpair=fr%7Cen" \
+  | python3 -c "import json,sys; d=json.load(sys.stdin); print(d['responseData']['translatedText'])"
+```
+
+Under the Claude Code hook (or when the user explicitly writes `rtk curl`), this pipeline fails:
+
+```
+json.decoder.JSONDecodeError: Expecting property name enclosed in double quotes: line 2 column 3 (char 4)
+```
+
+Because `rtk curl` returns:
+
+```
+{
+  exception_code: null,
+  matches:
+  [{
+      create-date: string,
+      created-by: string,
+      ...
+```
+
+instead of the raw JSON body that `json.load` expects.
+
+## Impact
+
+- Any LLM-generated pipeline using `curl | <parser>` breaks silently.
+- Root cause is opaque to the LLM: the tool sees a JSONDecodeError and blames its own parsing code, not rtk.
+- The Claude Code hook compounds the issue: users running `curl ... | jq` from the assistant never typed `rtk`, yet get hit by it.
+- Other rtk subcommands that transform output (`rtk aws`, `rtk psql`, `rtk json`, `rtk cat`) likely have the same class of bug.
+
+## Root cause
+
+`rtk curl` is not a passthrough — it post-processes the response body for LLM consumption. This is correct behavior when an LLM is the consumer. It is incorrect when a parser is the consumer.
+
+The tool currently has no way to distinguish those two cases.
+
+## Suggested fix
+
+Detect `isatty(stdout)` at startup. If stdout is **not** a TTY (i.e., it is piped, redirected to a file, or captured), skip the compression layer and passthrough the raw response bytes from the underlying `curl`.
+
+This matches the long-standing Unix convention followed by `ls`, `grep`, `diff`, etc., which disable colors and column formatting when piped.
+
+```rust
+// pseudo-code inside rtk curl
+if !io::stdout().is_terminal() {
+    return run_native_curl_passthrough(args);
+}
+// else: existing compression path
+```
+
+The same fix should apply to every rtk subcommand that transforms output (`cat`, `read`, `json`, `aws`, `psql`, `git`, `gh`, etc.).
+
+## Alternative / workaround
+
+- Users can prefix with `rtk proxy <cmd>` to bypass rewriting. But the Claude Code hook rewrites `curl` unconditionally, so the LLM has to *remember* to write `rtk proxy curl` every time it pipes, which does not scale.
+- Users can set `[hooks] exclude_commands = ["curl"]` in `~/.config/rtk/config.toml`, but this disables all rtk curl savings globally, even when the LLM IS the consumer.
+
+Neither replaces a proper TTY-aware passthrough inside rtk itself.
+
+## Environment
+
+- rtk: 0.34.3
+- OS: Linux 6.17
+- Shell: bash
+- Claude Code hook: `hooks/rtk-rewrite.sh` (rtk-hook-version: 3)
+
+## Checklist
+
+- [ ] `rtk curl` passes through raw bytes when stdout is not a TTY
+- [ ] Same behavior for `rtk cat`, `rtk read`, `rtk json`, `rtk aws`, `rtk psql`, `rtk git`, `rtk gh`
+- [ ] Add a test matrix: piped to `jq`, `python -c "json.load"`, file redirect, `/dev/null`
+- [ ] Document the TTY-aware behavior in the README