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1. bundle remove: BundlerError raised by the primitive installer itself (e.g. from a kind manager) bypassed the partial-removal bookkeeping message added previously via a bare `except BundlerError: raise`. Now routes through the same detail-construction logic as generic exceptions, so a mid-loop BundlerError after an earlier successful removal still reports that the project may be partially uninstalled, while a zero-removal BundlerError still reports "No components were removed." Both preserve the original exception message and chain `from exc`. 2/3. workflow add --from and catalog install/update downloads used unbounded `response.read()`, buffering the entire server-controlled body into memory before any size check, and trusted Content-Length alone where checked at all. Added a single shared `_read_response_within_limit()` helper reused by both call sites: it fails fast on an oversized declared Content-Length, and separately enforces the same cap while streaming in 64KiB chunks so a chunked or Content-Length-less response cannot bypass the limit by lying about or omitting its size. Chose 5 MiB as the cap: workflow YAML definitions are small step/metadata text, not binaries, so this is generous headroom against a malicious/misbehaving server without affecting any legitimate workflow definition. Both call sites already route any raised exception through their existing clean-error and rollback (`_cleanup_failed_install`) paths, so no additional error-handling plumbing was needed. Tests: extended the shared `_FakeResponse` test helper (and 5 duplicate per-test FakeResponse classes) to support `.read(amt)` chunked reads with an internal cursor (backward compatible with existing bare `.read()` callers) plus header simulation. Added red-first tests for: BundlerError after partial removal reporting partial state, BundlerError with zero removals reporting no changes, --from oversized-Content-Length rejection, --from oversized-streamed-body-without-Content-Length rejection, and the same two cases for the catalog install path (asserting no orphan directory/registry mutation on rejection). tests/integration/test_bundler_install_flow.py: 17 passed tests/test_workflows.py: 485 passed tests -q: 3992 passed, 110 skipped ruff check: clean on all touched files Assisted-by: GitHub Copilot (model: Claude Sonnet 5, autonomous) Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>