Close the eval, tier, Retry-After, and timeout gaps from the review - #2
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Eval coverage. SKILL.md's description names webhooks, caches, and LLM/tool calls as triggers, but none of the 21 prompts exercised them. Adds one prompt and rubric row each: webhook signature-before-side-effect, cache-key tenancy, and an agent tool that can delete accounts. Tier assignment. The tier table listed auth, tenancy, privacy, billing, and destructive actions as Tier 3 but not agent tools, so a reader tiering off the table alone landed a delete_account tool at Tier 1 or 2 and never opened the checklist that would have caught it. A tool now inherits the tier of the most damaging action it can perform. Retry-After. Both SKILL.md and the checklist require honoring it, bounded; the reference read no header at all. Adds a parser for both RFC 9110 s10.2.3 forms that discards anything unparseable, negative, or non-finite and clamps the rest, uses the hint in place of jitter on 5xx and 408, and surfaces it on 429 so a caller that does not retry here can still back off correctly. Per-phase timeouts. httpx applies a bare float to connect, read, write, and pool alike, so the example did not satisfy its own checklist item about bounding phases separately. Connect and pool are now independently configurable. httpx cannot split the TLS handshake from connect, which the checklist now records as inapplicable rather than unmet. Checks 15 to 20. CI extends to Python 3.14.
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📝 WalkthroughWalkthroughThe reference HTTP client now supports separate connection and pool timeouts, bounded ChangesResilient HTTP behavior
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: 🟡 Moderate · up to The new Retry-After handling can raise an exception when an upstream sends an extremely large numeric delay, instead of returning the normal bounded result. Clamp oversized numeric values before conversion and add regression coverage before merging. Sequence Diagram(s)sequenceDiagram
participant HTTPClient
participant HTTPServer
participant RetryAfterParser
participant RetryScheduler
HTTPClient->>HTTPServer: send request with phase-specific timeout
HTTPServer-->>HTTPClient: return retryable response and Retry-After
HTTPClient->>RetryAfterParser: parse bounded retry hint
RetryAfterParser-->>RetryScheduler: provide retry_after_s
RetryScheduler->>HTTPClient: wait for server hint or jitter, then retry
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
✨ Finishing Touches 💡 1📝 Generate docstrings 💡
🧪 Generate unit tests (beta)
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Inline comments:
In `@references/resilient_http_example.py`:
- Around line 302-304: Update the delay-seconds parsing around the raw-value
conversion to validate ASCII digits, normalize and clamp oversized values
against max_s before converting to float, and ensure 400-digit Retry-After
inputs return FetchResult instead of propagating OverflowError. Add a regression
case covering a 400-digit value.
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evals/defensive-design.prompts.csvis excluded by!**/*.csv
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.github/workflows/verify.ymlREADME.mdSKILL.mdevals/behavior-rubric.mdreferences/resilient_http_example.pyscripts/verify_reference.py
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CodeRabbit flagged the delay-seconds conversion on #2; it was a real crash, not a style point. `float(int(raw))` accepted more than RFC 9110 §10.2.3 allows - "+12", "1_2", and non-ASCII digits all parsed as numbers - and a long enough digit string escaped as an exception rather than a value: 400 digits raised OverflowError out of float(), 100000 raised ValueError from int()'s own 4300-digit limit. Either one propagated uncaught out of fetch_user_profile, so a header the client does not control could crash the caller. That is the exact failure the function exists to prevent. Now requires ASCII digits only, bounds the string before converting, and resolves anything past the cap to the cap. The HTTP-date branch also guards OverflowError and OSError, which datetime arithmetic can raise on extreme values.
1 participant
The five items PR #1 deliberately deferred.
Eval coverage
SKILL.md's description names webhooks, caches, and LLM/tool calls astriggers. None of the 21 prompts exercised them — the suite exists to test
trigger selection, and three named surfaces were never tested. Adds one prompt
and one rubric row each:
test-22test-23test-24delete_accounttool exposed to a support agent24 prompts, 24 rubric rows, aligned.
Tier assignment
The tier table listed auth, tenancy, privacy, billing, and destructive actions
as Tier 3 — but not agent tools. The concern existed in Stop-and-Reconsider and
in the Model/Tool/Agent checklist, just not on the surface a reader actually
uses to assign a tier. Someone tiering
test-24's tool off the table alonelanded it at Tier 1 or 2 and never opened the checklist that would have caught
it.
Retry-After
SKILL.mdand the checklist both require honoring it, bounded. The referenceread no header at all.
Adds a parser for both RFC 9110 §10.2.3 forms —
delay-secondsand HTTP-date.The RFC sets no upper bound, and the date form can be arbitrarily far in
the future, so anything unparseable, negative, or non-finite is discarded and
the rest is clamped to
max_retry_after_s. The hint replaces jitter on 5xx and408, and is surfaced on 429 via a new
FetchResult.retry_after_sso a callerthat does not retry here can still back off correctly.
Per-phase timeouts
httpx applies a bare float to connect, read, write, and pool alike — all four
are bounded, but not separately, which is what the checklist asks for
"where the client supports it". httpx does support it. Connect and pool are now
independently configurable via
attempt_timeout().httpcore shares one value between TCP connect and the TLS handshake, so that
clause genuinely cannot be satisfied. The checklist now records it as
inapplicable rather than silently unmet.
Verification
15 checks to 20, all passing with
-W error::DeprecationWarning. Newcoverage: Retry-After parsing across both formats and every rejection case, a
hostile
99999999clamped, the hint measurably beating jitter, per-phasetimeout construction, and three more pathological config values.
CI extends to Python 3.14.
Still open
ResilienceConfigdoes not rejectper_attempt_timeout_s > deadline_s, whichwould make retries structurally impossible. Left alone deliberately —
test_operation_deadline_is_hardsets exactly that combination on purpose toprove the outer deadline wins, so adding the check means reworking what that
test demonstrates.
Summary by CodeRabbit
New Features
Retry-Afterhandling for numeric and HTTP-date responses, prioritizing server-provided retry delays.Documentation