feat(assets): forward has_more/total through the assets library ls envelope

[mattmillerai]

ELI-5

comfy assets library ls asks the cloud for a page of your assets. The server answers with the rows and with two honest facts about the page — has_more ("there are more beyond this one") and total ("how many match altogether"). The CLI was throwing those two away and handing callers only {count, assets[]}, so anything downstream had to guess at truncation by checking whether the page came back exactly full. This forwards the server's own answer instead of making callers guess.

What changed

ls_cmd now copies has_more and total from the GET /api/assets response into the JSON envelope's data, alongside the existing count/assets — and only when the server actually sent them.

• Absent, not null. An older or self-hosted server may not send these. A forwarded JSON null is worse than a missing key for a consumer that type-asserts the value out of the decoded envelope, so a missing-or-null field leaves the key off entirely.
• Each field is validated against its own type. has_more must be a bool and total an int; a cross-typed value is dropped exactly like an absent one. This is deliberately not a shared isinstance(v, (bool, int)) test — bool is a subclass of int in Python, so one shared check forwards has_more: 0 and total: false, emitting an envelope that violates the schema this command publishes. Caught in review on the first revision of this PR and fixed in the second commit, with regression cases for both malformed values.
• false/0 still survive. The guard is a type check, not a truthiness check, so has_more: false and total: 0 are forwarded as real answers — a consumer can distinguish "not truncated" from "server didn't say", which is the whole point.
• comfy_cli/schemas/assets_library.json declares both fields. That schema is how an agent resolves this command's output shape through comfy discover, so a field that ships undeclared is a field nobody downstream knows to read. The schema is additionalProperties: true, so this is documentation rather than a validation change.

Also in this PR — malformed-response hardening

Review surfaced that ls_cmd never checked body was actually a dict. http_request returns whatever json.loads produced (its dict | None annotation is not enforced), so a proxy or error page answering 200 with a JSON array or scalar made b.get(...) raise a bare AttributeError, and a present-but-non-list assets made len(rows) raise TypeError. Both escape the except (HTTPError, URLError, OSError) above, so the user got a traceback where every other cloud failure on this command produces an envelope. This is pre-existing, but the passthrough adds two more .get calls on the same unvalidated value, so it is fixed here rather than left next to new code that depends on it — using the cloud_http_error envelope that workflow list already uses for the identical failure on the sibling endpoint. Coercing a malformed shape to [] is deliberately not the fallback, since that masquerades as a genuinely-empty library; an empty body remains a legitimate empty listing.

A later review pass found the same masquerade one level lower, on the path into that guard. cloud_http.http_request collapses both an empty body and a JSONDecodeError to None, so ls could not tell them apart: a 200 carrying a proxy or captive-portal error page emitted a successful, empty asset library — the exact failure the shape guards above refuse to make, arriving through the one door they do not cover. http_request now takes an opt-in strict_json that raises a new ResponseUnparseable on a non-empty undecodable body. ls opts in and emits the same cloud_http_error envelope as its sibling guards. ensure_cmd is the only other caller of that helper, and assets_library.py is the only module that imports cloud_http at all.

"Nothing to say" deliberately stays a success. The empty check became not raw.strip(), so zero bytes, a whitespace-only body and a JSON null all remain a legitimate empty listing — that is identical to the old behaviour on the default path, where they collapsed to None either way. Only genuinely undecodable content errors, so the change tightens a malformed case without closing off an empty library.

Also in this PR — every unparseable body, not just JSONDecodeError

A final review pass (CodeRabbit) found that the strict_json guard above caught the wrong set. It caught json.JSONDecodeError, but handed raw bytes json.loads rejects a malformed body with three different exceptions and only one of them is a JSONDecodeError:

body	raises	is a JSONDecodeError?
non-UTF-8 bytes (a binary error page, a gzip/TLS fragment from a proxy)	UnicodeDecodeError	no
a JSON integer past CPython's 4300-digit int/str limit	bare ValueError	no
pathologically nested input (the 64 MiB read permits it)	RecursionError	no — not even a ValueError

All three escaped strict_json and every call site's except, so ls crashed with a raw traceback for exactly the malformed response the ResponseUnparseable handler exists to convert into an envelope — the reported defect reappearing one layer up, in the handler meant to close it. Verified by probe before the fix: each of the three escaped unhandled on both the strict and default paths.

The catch is now except (ValueError, RecursionError) — the same catch, for the same reasons, as the sibling helper in workflow.py:975-989 that cloud_http was extracted from and that already got this right. Reviewer suggested adding UnicodeDecodeError alone; that would have left the other two escaping.

One deliberate departure from that sibling. workflow.py also decodes UTF-8 explicitly before parsing, to reject a UTF-16/32 body that json.loads would otherwise sniff and accept. That is not copied here: it would newly reject a body that parses fine today, no reviewer asked for it, and it would break a server that currently works. Confirmed by control probe — a UTF-16 body still parses on both paths, as do well-formed, empty and whitespace-only bodies.

The default path does change for these three classes, which is why the byte-for-byte claim above is now corrected rather than repeated. They previously escaped as a traceback and now collapse to None, which is what the helper's docstring already promised for an undecodable body. That makes ensure_cmd consistent with its existing behaviour for ordinary invalid JSON instead of branching on which exotic bytes arrived; the fake-success this exposes there is pre-existing for every other malformed body, is not widened in kind (only in which byte sequences reach it), and is tracked separately.

Why the old signal was wrong

Inferring truncation from len(rows) >= limit is wrong in both directions. It reads any short truncated page as a complete library — the dangerous direction, since a consumer gating on "is this asset in the library?" would then report assets it simply never saw. And it fires spuriously on a library of exactly --limit assets, needlessly disabling the gate. The server's has_more has neither failure: it is computed from a limit+1 sentinel row rather than from the returned row count, so it stays correct on a short page.

Consistency note: models search / models show already read has_more and total off this same /api/assets endpoint (comfy_cli/command/models/search.py). This brings assets library ls in line with them.

Sizing the half not fixed

Swept every /api/assets call site in comfy_cli/ so the scope claim is a number rather than an impression: 4 call sites, 3 of which are list GETs. One is the upload POST (deploy_assets.py, no pagination to forward). Of the three list GETs: this PR fixes assets_library.ls_cmd; models/search.py's exact-name paging loop already terminates on the server's has_more and is correct as-is; and models/search.py's _cloud_search already surfaces total in its own envelope (rendered as "(of N total)") but not has_more — a caller there can still compare len(rows) < total, so it is a weaker signal rather than an absent one, and it is left alone as out of scope.

Rebase note: the test file this PR extends was introduced by #820, which merged on 2026-08-29. This branch is cut from main at a commit that already contains it, so there is no rebase pending and no overlap — #820 touched the ensure error path, this touches ls.

Verification

Verified the premise against the API contract rather than assuming it, and confirmed red→green rather than shipping tests that only assert their own premise:

• Read the cloud API's ListAssetsResponse schema: assets, total and has_more are all listed required; total is an integer and has_more a boolean.
• Read the server handler: it fetches limit + 1 rows and derives has_more from whether the sentinel row came back, explicitly not from a count — so the flag is accurate on a short page.
• Read the downstream consumer that motivated this. It still keys truncation off len(rows) >= 500, and its own comment names this CLI file as the reason ("the flag does not survive the CLI").
• Reverted the product change and re-ran the new tests: 2 failed / 7 passed. With the change: 9 passed.
• Ran the whole suite: 1 failed, 7386 passed, 38 skipped. The one failure is tests/comfy_cli/test_http.py::test_an_unloadable_supplement_falls_through_to_the_platform_roots, which is pre-existing and unrelated — it fails identically on a clean checkout of main with none of this diff applied (verified in a separate detached worktree at origin/main: 1 failed, 72 passed). It concerns TLS CA-bundle fallback and touches nothing this PR changes. Not fixed here, and not this PR's to fix.

Tests

tests/comfy_cli/command/test_assets_library.py::TestLsPagination — both fields forwarded; has_more: false / total: 0 forwarded rather than dropped as falsy; keys absent when the server omits them; keys absent when the server sends nulls; keys absent when the server sends cross-typed values (has_more: 0, total: false) or wrong-JSON-type values (strings); the existing count/assets[] projection byte-for-byte unchanged; the emitted payload validated against the published schema; an invalid-JSON 200 body producing an error envelope rather than an empty listing, while a raw-empty and a whitespace-only body each stay an empty listing; and count matching the emitted array on a response containing a malformed row. Plus an invalid-UTF-8 200 body producing an error envelope rather than a traceback, end-to-end through ls.

tests/comfy_cli/command/test_assets_library.py::TestHttpRequestRejectsEveryUnparseableBody — the bare-ValueError and RecursionError classes pinned directly on http_request, on both the strict and default paths. These two are driven through a patched json.loads rather than through pathological input, because the thresholds that produce them naturally (CPython's int-digit limit, the recursion limit) move between interpreter versions and would make the test a platform coin-flip across the three CI OSes on 3.10; the invalid-UTF-8 case is deterministic everywhere and is exercised for real.

Also in this PR — count now describes the array it sits next to

count was len(rows) over the raw server rows while assets[] filters out any non-dict row, so a single malformed row reported more items than the payload actually carried. Two reviewers raised it independently, with the fair point that a knowingly-skewed count sitting beside a forwarded total undercuts the whole purpose of this change, and that the repo convention (comfy_cli/command/nodes.py:284) is for count to describe the emitted array.

An earlier revision of this PR declined the fix on the grounds that redefining published output is a contract decision. On a second look that reasoning does not hold: for every well-formed response the two expressions are equal, so no consumer of a valid response can observe the change at all. It differs only on a malformed row — precisely where the old value was simply wrong. count is now len(assets), and test_count_matches_the_emitted_assets_and_projection_is_unchanged pins both the corrected count and the byte-for-byte unchanged field projection.

Residual

Not fixed here, and each item is written to stand on its own:

• The consumer still infers truncation from a full page. The cloud-side asset gate that motivated this change is in a different repository and is not touched by this PR — it continues to treat len(rows) >= 500 as the truncation signal, so the improved signal is available but not yet consumed. Its source comment asserting that the flag "does not survive the CLI" is stale as of this PR and should be updated when that side is changed. That is the separately-tracked follow-up phase, not a gap in this diff.
• next_cursor is not forwarded. The same response also carries an optional next_cursor string for keyset pagination. It is deliberately out of scope here: forwarding it only helps once ls grows a way to use a cursor (there is no --after/--cursor option today), and shipping a cursor a caller cannot pass back invites a consumer to build paging on a half-present contract. Worth its own change alongside a paging flag.
• total is not meaningful in the server's cursor mode. The server skips the COUNT query when paginating by cursor, so total there is not an authoritative count. ls never sends a cursor (offset mode only), so this is unreachable from this command today — but it becomes live the moment the next_cursor item above is done, and a consumer that trusts total unconditionally would be reading a value nobody computed.

Artifacts named by the task that I could not exercise, and why:

• No call against a live /api/assets. Every test stubs urllib.request.urlopen; this sandbox has no authorized cloud target or API key, so the passthrough is proven against the published response contract and the server's own handler source, not against a live server. If the deployed server ever diverged from its spec on these two fields, nothing here would catch it.
• The originating tracker issue and its investigation notes were not readable from this environment. The implementation plan was reconstructed from, and checked against, the API contract and the server/consumer source directly; any acceptance detail recorded only in that tracker is unverified by me.

Provenance

• Authored by: agent-work loop

• Verified: on the final commit (ec5fc4f6, the review-resolution commit) — ruff check . / ruff format --diff . under the pinned CI ruff 0.15.15: clean, 446 files already formatted. pytest tests/comfy_cli/command/test_assets_library.py: 23 passed, 0 failed. Red→green confirmed by reverting only the product change: 5 failed / 18 passed, restored 23 passed. That red run is also what caught a bad first attempt at the regression test — b"\xff\x00\x8f ..." passes with and without the fix, because json.loads sniffs the leading \xff\x00 as a UTF-16-LE BOM and fails as an ordinary JSONDecodeError; the committed test uses non-BOM invalid UTF-8 (b"\x80\x81\x82 ..."). The premise and the fix were each checked by direct probe of http_request rather than inferred: before, all three of UnicodeDecodeError / bare ValueError / RecursionError escaped unhandled on both the strict and default paths; after, all three are classified, while control bodies that parse today (well-formed, UTF-16, empty, whitespace-only) still parse identically on both paths. Full-suite regression check done as a before/after diff on the same machine rather than as an absolute number, because this checkout's local venv is missing blake3 and runs a typer/click combination that breaks a set of tests unrelated to this diff: the failing-id set with the diff applied is identical to the set with it stashed (101 both ways, zero added, zero removed), so this commit introduces no regression. CI on the PR was green on all 18 checks before this commit, which is the authoritative signal for those locally-broken tests. Blast radius re-verified by grep: cloud_http is imported by exactly one module (assets_library.py), and http_request has exactly two call sites, only one of which opts into strict_json. Earlier commits — f14ebb72: 18 passed; reverting the per-field guard to the shared bool-or-int check makes the regression case fail (1 failed, 10 passed); on the first commit, full pytest was 7386 passed / 38 skipped / 1 failed, that one failure (test_http.py::test_an_unloadable_supplement_falls_through_to_the_platform_roots) reproducing on a clean origin/main checkout

• Deviations: four departures from the requested change, all deliberate and all driven by review. First, the ticket prescribed a shared isinstance(b.get(k), (bool, int)) guard; that is unsafe once the fields are declared in the schema, because Python's bool-is-an-int makes it forward has_more: 0 / total: false and emit a schema-violating envelope. The guard is per-field instead, and rejects a negative total for the same reason. Second, the PR also fixes the malformed-response traceback described above — pre-existing, but sitting directly under the new .get calls, and the repo already had a settled pattern to copy; a follow-up review pass extended that fix to the invalid-JSON body, which reached the same masquerade through the one door the shape guards did not cover, and which required an opt-in strict_json flag on the shared cloud_http.http_request helper. Third, count is now derived from the emitted assets array rather than the raw server rows; an earlier revision deferred this as a contract change, but the two values are equal for every well-formed response, so the correction is unobservable except where the old value was wrong. Fourth, and newest, that strict_json guard caught only json.JSONDecodeError while json.loads rejects a malformed body with three different exceptions; the catch is broadened to (ValueError, RecursionError) following the sibling helper in workflow.py. That fourth item narrows an earlier claim in this body: the strict_json default path is no longer byte-for-byte unchanged — for those three exception classes it now collapses to None (as the helper's docstring already promised) instead of escaping as a traceback. The sibling's explicit UTF-8 pre-decode is deliberately not copied, since it would newly reject UTF-16/32 bodies that parse today. Beyond the literal request: the two fields are also declared in comfy_cli/schemas/assets_library.json (that schema is the published output contract for this command, so an undeclared field is invisible to the agents that read it), and the test set adds a has_more: false / total: 0 case, a schema-validation case, and the malformed-body cases above.

  One item is not fixed here and was proposed as a follow-up instead: ensure_cmd in the same file has the identical unvalidated-body defect (a non-dict 200 raises a bare AttributeError; an unparseable one emits created_new: false with a null id, a fake success for a borrow that may not have happened). It is a different command on a different endpoint (/api/assets/from-hash) and out of scope for a PR about ls pagination, so it is tracked separately rather than folded in.

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📝 Walkthrough

Walkthrough

The assets library list command adds strict cloud response parsing, validates response shapes, and forwards valid has_more and total metadata. The schema defines these fields. Tests cover malformed responses, empty bodies, metadata filtering, and asset shaping.

Changes

Assets library response

Layer / File(s)	Summary
Add strict JSON transport parsing comfy_cli/command/cloud_http.py	http_request supports opt-in strict JSON parsing. Non-empty invalid JSON raises ResponseUnparseable, while whitespace-only bodies remain empty responses.
Validate and shape list responses comfy_cli/command/assets_library.py, comfy_cli/schemas/assets_library.json	The command rejects non-object responses and non-array assets values. It filters non-object rows, counts emitted assets, and forwards valid boolean has_more and non-negative integer total values. The schema defines both fields.
Verify response behavior tests/comfy_cli/command/test_assets_library.py	Tests cover valid, falsey, absent, null, and invalid metadata. They also verify malformed response errors, empty bodies, asset shaping, emitted-row counts, strict decoding failures, and schema validity.

Sequence Diagram(s)

sequenceDiagram
  participant AssetsLibraryCommand
  participant HTTPRequest
  participant CloudAPI
  AssetsLibraryCommand->>HTTPRequest: request listing with strict_json
  HTTPRequest->>CloudAPI: send cloud request
  CloudAPI-->>HTTPRequest: response body
  HTTPRequest-->>AssetsLibraryCommand: parsed JSON or ResponseUnparseable
  AssetsLibraryCommand-->>AssetsLibraryCommand: validate assets and metadata
  AssetsLibraryCommand-->>AssetsLibraryCommand: emit shaped assets and count

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Merge Risk: ⚪ Minimal · up to ec5fc

Assets library listings now expose validated pagination metadata and return cloud error envelopes for malformed responses without leaving an identified merge-blocking risk.

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In `@comfy_cli/command/assets_library.py`:
- Line 92: Update the pagination-field validation in ls_cmd to check each field
against its schema-defined type separately, rejecting boolean values where
integers are required and integer values where booleans are required; add
regression cases covering has_more=0 and total=False.

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Triggered by @mattmillerai.

Found 4 finding(s).

Severity	Count
🟡 Medium	1
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In `@comfy_cli/command/assets_library.py`:
- Line 77: Update the http_request handling in
comfy_cli/command/assets_library.py at lines 77-77 to distinguish empty response
bytes from JSON decode failures, returning the existing cloud_http_error
envelope for nonempty invalid JSON while preserving the empty-listing behavior
for raw empty bytes. Update tests/comfy_cli/command/test_assets_library.py at
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produces an empty listing.

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[mattmillerai]

Resolved all five open review threads in f14ebb72, and re-requesting review.

Three were already fixed by earlier commits on this branch (the per-field bool/int guard, the non-dict/non-list shape guards, the schema's minimum: 0 on total) — replied on each with the commit and the pinning test.

Two were live and are fixed now, both the same defect class:

• Invalid JSON read as an empty listing (CodeRabbit, Major). cloud_http.http_request collapsed both an empty body and a JSONDecodeError to None, so a 200 carrying a proxy or error page emitted a successful, empty asset library. http_request now takes an opt-in strict_json raising ResponseUnparseable; the default path is unchanged, so the only other caller (ensure_cmd) is untouched. The empty check became not raw.strip() so raw-empty, whitespace-only and JSON-null bodies all stay legitimate empty listings — only genuinely undecodable content errors.
• count disagreed with the array it describes (2 reviewers). Now len(assets). An earlier revision deferred this as a contract change; that was wrong — the two values are equal for every well-formed response, so the change is unobservable except where the old value was simply wrong.

Verification: pinned CI ruff 0.15.15 clean; test_assets_library.py 18 passed. Full-suite regression checked as a before/after diff on the same machine (this local venv is missing blake3 and has a typer/click break unrelated to this diff) — the set of failing test ids is identical with the diff applied and stashed, so no regression. CI on the PR is the authoritative signal for those locally-broken tests.

One adjacent item deliberately not folded in: ensure_cmd in the same file has the identical unvalidated-body defect on /api/assets/from-hash (a non-dict 200 raises a bare AttributeError; an unparseable one emits created_new with a null id — a fake success for a borrow that may not have happened). Different command, different endpoint, no review coverage asking for it, so it is recorded for separate triage rather than widening a pagination PR into a second command's error path.

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Inline comments:
In `@comfy_cli/command/cloud_http.py`:
- Around line 91-93: Update the strict JSON parsing exception handling in
http_request to catch both json.JSONDecodeError and UnicodeDecodeError,
converting either failure to ResponseUnparseable while preserving the existing
non-strict behavior. Add a regression test using invalid UTF-8 bytes such as
b"\xff" and verify assets_library.ls_cmd exposes the expected cloud_http_error
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[mattmillerai]

🤖 The reviews loop filed Linear follow-up ticket(s) for review thread(s) deferred as out of scope for this PR:

• BE-11865 — Harden assets library ensure against a malformed cloud response the way ls now is — filed as agent-spike (premise unverified)

The following carry agent-spike instead of agent-ok because their reachability claim was not backed by evidence (BE-5378) — the claim is investigated before any code is written, and "the premise does not hold" is a valid, successful outcome:

• Harden assets library ensure against a malformed cloud response the way ls now is — no reachability block in the proposal

[mattmillerai]

Resolved the one remaining open review thread in ec5fc4f6.

CodeRabbit, Major — UnicodeDecodeError bypasses the strict-JSON guard. Valid, and broader than reported. The strict_json guard added in f14ebb72 caught json.JSONDecodeError, but handed raw bytes json.loads rejects a malformed body with three different exceptions and only one of them is a JSONDecodeError:

body	raises	is a JSONDecodeError?
non-UTF-8 bytes (binary error page, gzip/TLS fragment from a proxy)	UnicodeDecodeError	no
JSON integer past CPython's 4300-digit int/str limit	bare ValueError	no
pathologically nested input (the 64 MiB read permits it)	RecursionError	no — not even a ValueError

All three escaped strict_json and every call site's except, so ls crashed with a traceback for exactly the malformed response the ResponseUnparseable handler exists to turn into an envelope — the reported defect reappearing one layer up, inside the handler meant to close it. Verified by direct probe of http_request before the fix, not inferred.

The catch is now except (ValueError, RecursionError), matching the sibling helper in workflow.py:975-989 that cloud_http was extracted from and that already documents all three. Adding UnicodeDecodeError alone, as suggested, would have left the other two escaping.

Two things worth flagging rather than burying:

• A claim in the PR body was wrong and is now corrected. It said the strict_json default path was "byte-for-byte unchanged". For these three exception classes it no longer is — they previously escaped as a traceback and now collapse to None, which is what the helper's docstring already promised for an undecodable body. This makes ensure_cmd (the only other caller) consistent with its existing behaviour for ordinary invalid JSON rather than branching on which exotic bytes arrived. The fake-success that exposes in ensure is pre-existing for every other malformed body and already separately tracked; it is widened only in which byte sequences reach it, not in kind.
• I did not copy the sibling's explicit UTF-8 pre-decode. workflow.py decodes UTF-8 before parsing, which additionally rejects UTF-16/32 bodies that json.loads sniffs and accepts. That would newly reject a body that parses fine today, nobody asked for it, and it would break a server that currently works. Control probe confirms a UTF-16 body still parses on both paths, as do well-formed, empty and whitespace-only bodies.

My first attempt at the regression test passed with and without the fix — b"\xff\x00\x8f ..." is sniffed as a UTF-16-LE BOM and fails as an ordinary JSONDecodeError, the case the narrow catch already handled. The red run caught it; the committed test uses non-BOM invalid UTF-8.

Verification. Red→green 5 failed → 23 passed on the touched file. Pinned CI ruff 0.15.15 clean, 446 files formatted. Full suite checked as a before/after diff on the same machine (this venv is missing blake3 and has a typer/click break unrelated to this diff): the failing-id set is identical with and without the change — 101 both ways, zero added, zero removed.

No new deferrals; nothing else open on this PR.