fix(http): decide token rotation before a backoff strategy can refuse to wait, and resolve the wait cap at construction by darynaishchenko · Pull Request #1126 · airbytehq/airbyte-python-cdk

Daryna Ishchenko (darynaishchenko) · 2026-08-20T16:27:36Z

What

Two changes to when HttpClient rotates credentials instead of waiting out a rate limit. The first is the bug in the title; the second rides on the same reorder and is a deliberate widening, not a fix — both are described below and both are pinned by tests.

A capped strategy can no longer pre-empt rotation. HttpClient can shorten a rate-limit wait when the authenticator holds a spare credential, and a backoff strategy can refuse a wait that exceeds a cap. Combining the two loses the first: a capped strategy ends the stream while a fully-quota'd credential sits idle.
Rotation now also covers rate limits that produce no wait at all, where the old order fell through to the default exponential retry. That changes which exception is raised and therefore which retry curve runs: RateLimitBackoffException → UserDefinedBackoffException, backoff.expo (1s, 2s, 4s, …) → backoff.constant at 0.1 + 1s, and max_time — not passed to the rate-limit handler — now bounds the loop. On a credential with quota that is the better curve, but it is a semantic change to behaviour that shipped in 7.26.0, which is why the title carries it.
Both capped strategies resolve max_waiting_time_in_seconds in __post_init__. Follows from 1: if the strategies can be skipped, a cap that cannot be evaluated can go unreported. See below.

The two features shipped two days apart — the rotation shortcut in #1117 (7.26.0), the cap in #1123 (7.27.0) — and nothing covered them together.

Why

_handle_error_resolution asks the strategies for a wait, then rewrites that wait when the response was rate-limited and another credential is available:

user_defined_backoff_time = None
for backoff_strategy in self._backoff_strategies:      # step 1
    backoff_time = backoff_strategy.backoff_time(...)  #   <- a capped strategy raises here
    ...

if (                                                   # step 2
    user_defined_backoff_time
    and error_resolution.response_action == ResponseAction.RATE_LIMITED
    and self._can_retry_on_another_token(request)
):
    user_defined_backoff_time = self.TOKEN_ROTATION_BACKOFF

Step 2 is expressed as a modification of step 1's result, so it depends on step 1 returning. WaitUntilTimeFromHeaderBackoffStrategy._capped raises AirbyteTracedException instead of returning when the computed wait exceeds max_waiting_time_in_seconds, so control leaves the function at step 1 and rotation is never considered.

Measured on source-github (airbytehq/airbyte#81428), two tokens, one rejected with X-RateLimit-Reset an hour out:

wait budget	before	after
120 min (no cap hit)	rotates, retry in 0.1 s	unchanged
30 min (cap hit)	stream stops, spare token idle	rotates, retry in 0.1 s

The connector-side consequence is worse than a wasted wait: a user who lowers the wait budget — asking for less waiting — gets a failed sync where the connector would previously have carried on. A bound on waiting silently became a bound on the sync.

How

Ask the rotation question first, and only fall through to the strategies when the answer is no.

When another credential can serve the retry, the strategies are not consulted at all. That is deliberate rather than an optimisation: the wait they compute is derived from the rejected credential's response headers, and the retry will not use that credential, so the number describes a window nobody is waiting for. Skipping them also means a strategy that refuses to wait cannot pre-empt the decision.

When there is no spare credential, the loop runs exactly as before and a cap still ends the stream — that path is untouched, and a test pins it.

Non-rate-limit resolutions (RETRY, REFRESH_TOKEN_THEN_RETRY) are unaffected: the rotation branch is gated on RATE_LIMITED, as it was before.

Two consequences of not calling the strategies, both deliberate and both now pinned by tests:

A rate limit that produces no backoff at all rotates too, where the old order fell through to the default exponential retry. has_alternative_token only answers True when the sending credential is tracked and spent, so this is the same retry on a credential with quota rather than a blind shortcut.
A max_waiting_time_in_seconds the manifest got wrong is no longer reported from this path. evaluate_max_waiting_time raises system_error for a cap it cannot resolve, and that check lives inside the strategy — so with rotation available a broken cap now stays quiet until the first rate limit that finds no spare credential. Resolving the cap once in __post_init__ closes it on every path, and is the better fix, but it moves when the field raises and breaks nine tests that assert the current timing — that is feat(low-code): cap the wait WaitUntilTimeFromHeader is willing to return #1123's contract, not this PR's ordering, so it is recorded in the comment and left for its own change.

Resolving the cap at construction

Deciding rotation first means a strategy may never be asked for a wait — and the check that a manifest's max_waiting_time_in_seconds can be evaluated at all lived inside that call. Measured on an earlier commit of this branch, with max_waiting_time_in_seconds: "{{ config['not_in_spec'] }}" and a 429 an hour out:

authenticator	before	after
spare credential available	`200` — the bound is not applied and nothing says so	raises at construction
no spare credential	`system_error`	raises at construction

Two outcomes from one manifest, decided by the quota state of an unrelated credential. Caching the resolved value or storing the error to re-raise would not have helped: the rotation path never reaches backoff_time(), so detection had to leave it. config is a dataclass field and this cap interpolates over config alone, so the value is knowable as soon as the component exists, and ModelToComponentFactory already passes the real config.

This is a contract change, and it is the reason the fix was initially deferred. Nine tests pinned the old timing and now assert construction instead — five in test_wait_time_from_header.py, four in test_wait_until_time_from_header.py. What they assert otherwise is unchanged: still an AirbyteTracedException with system_error, still never a raw jinja or float error, still the connector's fault rather than the user's. Only the moment moves, from "the first retryable error that reaches a strategy" to "when the strategy is built".

Fleet impact is nil today, which is what makes this the cheap moment to do it — every user of the field resolves cleanly: source-github (#81428) guards with config.get(...) is not none, source-klaviyo passes a float, source-granola hardcodes 60. Not a breaking change: no field added, removed or renamed, no default changed, no manifest edit required of anyone. It changes when an already-invalid manifest reports itself.

The lazy check stays alongside it, so a strategy constructed directly in Python behaves as before.

Tests

Four added to unit_tests/sources/streams/http/test_http_client.py, plus one guard on the schema itself:

Test	Asserts
`test_rotation_is_preferred_over_a_strategy_that_refuses_to_wait`	with a spare credential, the request succeeds after a sub-second retry
`test_a_refusing_strategy_still_ends_the_stream_without_a_spare_credential`	with no spare credential, the cap still raises
`test_rotation_is_preferred_over_the_real_capped_strategy`	the same, driving the real `WaitUntilTimeFromHeaderBackoffStrategy` with a cap below the wait the response asks for
`test_rotation_also_covers_a_rate_limit_with_no_computed_wait`	a strategy returning `None` is not consulted at all on the rotation path

The first fails on main (AirbyteTracedException instead of a 200), verified by reverting the source change with the tests in place. The third exists because the stub tests would survive the cap being changed to return instead of raise, which is the failure mode that produced this bug.

Both max_waiting_time_in_seconds schema descriptions, both class docstrings, WaitUntilTimeFromHeader._capped and WaitTimeFromHeader's inline cap said "stop the stream" and "0 means never wait" without qualification. Neither holds once rotation preempts the strategy, so each now says the bound applies only when waiting is the only way forward.

unit_tests/sources/declarative/test_declarative_component_schema_is_loadable.py is new and unrelated to the behaviour change: it loads the shipped schema through the same helper every declarative source uses. Nothing asserted that before, and the first version of the description edit above put a ": " inside a plain YAML scalar, which stopped the whole schema parsing and failed every low-code source. That is fixed here by quoting both scalars — the text is unchanged, so the generated models still match — and the new test catches the class of mistake in milliseconds.

Checks

unit_tests/sources/streams/http, .../declarative/requesters/error_handlers, .../declarative/auth, plus the new schema guard: 763 passed
unit_tests/sources/declarative: the test_concurrent_declarative_source failures are pre-existing — same names, on an origin/main worktree (a requests_cache sqlite lock on this machine)
ruff format --check, ruff check: clean
mypy on all five changed modules (http_client.py, error_handlers/backoff_strategy.py, max_waiting_time_helper.py and both backoff strategies): clean
unit_tests/.../error_handlers: 147 passed after the nine timing tests were moved to construction
The three rotation tests still fail against main's http_client.py after being refactored onto the _rate_limited_client helper

Why it is worth taking now

The interaction was found while reviewing airbytehq/airbyte#81428, which needs it. At that PR's head the cap is applied on both wait paths with the user's configured budget — max_waiting_time_in_seconds: "{{ (config['max_waiting_time'] ... else 120) * 60 + 1 }}" on WaitTimeFromHeader and WaitUntilTimeFromHeader — and the manifest comment says so, pointing at a prerelease of this PR and at test_short_wait_budget_does_not_cost_token_rotation as the end-to-end proof. Without this fix, a budget shorter than the distance to the reset ends the stream with a healthy second token idle (measured on 7.28.0: a 30-minute budget against a 60-minute reset).

Still worth a maintainer's read on the ordering choice — specifically, whether skipping the strategies entirely on the rotation path is right, or whether the wait should still be computed and discarded. The trade-off is written up under "Two consequences" above: skipping means a max_waiting_time_in_seconds the manifest got wrong is not reported from this path.

Summary by CodeRabbit

Bug Fixes
- Improved rate-limit handling by prioritizing credential rotation before applying backoff strategies.
- Retries using an alternative credential now bypass configured wait limits and use the standard rotation delay.
- Clarified maximum-wait behavior for header-based retry strategies, including boundary conditions.
Documentation
- Updated retry and backoff guidance to accurately describe credential rotation, wait caps, and strategy behavior.
- Expanded validation guidance for declarative schema documentation.

… to wait `_handle_error_resolution` computes a backoff and then, for a RATE_LIMITED resolution, replaces it with `TOKEN_ROTATION_BACKOFF` when the authenticator reports a spare credential (#1117). That second step is written as a modification of the first one's result, so it only runs if a strategy returned a number. `WaitUntilTimeFromHeader.max_waiting_time_in_seconds` (#1123) does not return a number when the wait exceeds the cap — it raises. So whenever the cap is exceeded the function exits before the rotation question is asked, and the stream ends while a fully-quota'd credential sits idle. Measured on source-github: two tokens, a 60-minute reset and a 30-minute budget stops the sync, where the retry would have gone out on the other token in 0.1s. The rotation question is now asked first. When another credential can serve the retry, the strategies are not consulted at all: the wait they compute describes the window of the credential that was rejected, which is not the one the retry will use. When there is no spare credential the strategies run exactly as before, so a cap still ends the stream — which is what it is for. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

github-actions · 2026-08-20T16:27:49Z

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github-actions · 2026-08-20T16:36:34Z

PyTest Results (Fast)

4 344 tests +6 4 333 ✅ +6 9m 38s ⏱️ + 1m 6s
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github-actions · 2026-08-20T16:42:44Z

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Review findings applied. The schema descriptions for both `max_waiting_time_in_seconds` fields, and `_capped`'s docstring, promised "stop the stream" and "0 means never wait" unconditionally. Neither holds once rotation preempts the strategy, so each now says the bound applies only when waiting is the only way forward. Two tests added. One drives the real WaitUntilTimeFromHeaderBackoffStrategy with a cap below the wait the response asks for, so the integration that regressed is pinned rather than only the client's contract against a stub — the stub tests would survive the cap being changed to return instead of raise. The other covers a rate limit that produces no backoff at all, which now rotates where it previously fell through to exponential retry: intended, but a behaviour change worth pinning. The log line says a wait was skipped without the number it can no longer compute, and names the cap, since nothing else tells an operator their configured bound was not consulted. Not applied: resolving the cap in `__post_init__` so an unreadable one fails at construction. It is the right fix for a real gap — on the rotation path a manifest-level cap error now surfaces only when no spare credential exists — but it moves when `max_waiting_time_in_seconds` raises and breaks 9 tests that assert the current timing, so it changes #1123's contract rather than this PR's ordering. Recorded in the comment; belongs in its own change. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Reverts the workaround from a61b58d. Both backoff strategies interpolate Max Waiting Time again, so the setting bounds every rate-limit wait rather than only the ones the authenticator decides before sending, and check keeps its fast fail through the max_waiting_time: 0 override. The sentinel existed because the CDK asks the authenticator for a spare credential only after a strategy returns a wait, while a cap raises instead of returning — so a budget shorter than the reset distance ended the stream rather than rotating. That is fixed properly in airbytehq/airbyte-python-cdk#1126 instead of worked around here. This PR cannot merge before that lands anyway, since it is what the connector is waiting on. test_short_wait_budget_does_not_cost_token_rotation is marked xfail(strict) against the pinned 7.28.0, with the CDK PR named in the reason. Strict is the point: the moment the repin makes rotation work, the test xpasses, the suite turns red, and the marker has to come out. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

The sentence added in the previous commit contains ": ", which ends a plain YAML scalar — so declarative_component_schema.yaml stopped parsing and every low-code source failed at startup, before any connector was built. A documentation edit, not the behaviour change, took out four Pytest matrix jobs and two connector checks. Both descriptions are now single-quoted, which is what the file already does for the three other descriptions containing ": ". Quotes are YAML syntax rather than part of the value, so the text still matches models/declarative_component_schema.py verbatim and no regeneration is needed. Nothing asserted that the schema the CDK ships can be read, which is why a prose edit reached CI at all. test_declarative_component_schema_is_loadable loads it through the same helper every declarative source uses and reads every description back, so a truncated scalar fails in milliseconds instead of taking 194 unrelated tests down with it. Verified it fails on the broken file. Also qualifies both class docstrings, and adds the note to WaitTimeFromHeader, whose cap is checked inline and had none. While in that file: its comment claimed WaitUntilTimeFromHeader stops at `>` and this one at `>=`; both use `>=`. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

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📝 Walkthrough

Walkthrough

HttpClient now rotates to an available credential before evaluating rate-limit backoff strategies. Declarative backoff documentation describes inclusive wait limits and credential-rotation bypasses. Tests cover the updated flow and packaged schema validation.

Changes

Rate-limit credential rotation

Layer / File(s)	Summary
Credential rotation before backoff `airbyte_cdk/sources/streams/http/http_client.py`, `airbyte_cdk/sources/streams/http/error_handlers/backoff_strategy.py`, `unit_tests/sources/streams/http/test_http_client.py`	HttpClient checks for an alternative credential before invoking backoff strategies. The backoff contract documents that credential rotation skips strategy invocation. Tests reuse a shared rate-limit client helper.
Backoff limit documentation `airbyte_cdk/sources/declarative/...`	Schema and strategy descriptions state that wait caps are inclusive, apply when the strategy waits, and are bypassed during credential rotation.
Packaged schema source validation `unit_tests/sources/declarative/test_declarative_component_schema_is_loadable.py`	The schema test scans mapping values and bare sequence items for unsafe unquoted punctuation and preserves schema loadability checks.

Estimated code review effort: 3 (Moderate) | ~25 minutes

Merge Risk: 🔵 Low · up to a44e1

The change improves credential rotation under rate limits and preserves capped waiting when no alternate credential exists. Merge is reasonable with owner follow-up because the cap documentation may not precisely describe the equality boundary, and the schema validation test may not cover every unsafe scalar location.

Sequence Diagram(s)

sequenceDiagram
  participant HttpClient
  participant Authenticator
  participant BackoffStrategy
  HttpClient->>Authenticator: Check for an alternative credential
  alt Alternative credential available
    Authenticator-->>HttpClient: Return available credential
    HttpClient->>HttpClient: Apply TOKEN_ROTATION_BACKOFF
  else No alternative credential
    HttpClient->>BackoffStrategy: Calculate rate-limit backoff
    BackoffStrategy-->>HttpClient: Return wait or refusal
  end

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Inline comments:
In `@airbyte_cdk/sources/declarative/declarative_component_schema.yaml`:
- Line 4805: Update the documentation for the inclusive cap condition: in
airbyte_cdk/sources/declarative/declarative_component_schema.yaml:4805-4805 and
airbyte_cdk/sources/declarative/models/declarative_component_schema.py:1481-1481,
state that a computed wait greater than or equal to max_waiting_time_in_seconds
stops the stream; make the class documentation at
airbyte_cdk/sources/declarative/requesters/error_handlers/backoff_strategies/wait_until_time_from_header_backoff_strategy.py:39-41
and _capped() documentation at :97-100 consistent, without changing behavior.

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airbyte_cdk/sources/declarative/requesters/error_handlers/backoff_strategies/wait_until_time_from_header_backoff_strategy.py
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The schema guard's second test claimed to catch a description truncated by a `" #"` comment marker, but only asserted that each description was a non-empty string -- which a truncated description still is. It now lints the source text, read through the loader's own `pkgutil.get_data`, for any plain scalar carrying `": "` or `" #"`. Widened from `description` to every inline value, since the hazard belongs to the scalar style rather than to the field; list items stay excluded, because `- key: value` is a nested mapping. Two wording fixes to the `max_waiting_time_in_seconds` prose. The rotation qualification omitted that `HttpClient` only skips the strategy on a rate-limited response, so it overstated for every other retryable error. And both strategies compare `>=` while their documentation said "longer than", including the message `WaitUntilTimeFromHeader._capped` raises -- a wait exactly equal to the cap is refused, and now the prose says so. Behaviour is unchanged. Both schema descriptions were mirrored into the generated models and verified verbatim-equal, so no codegen run is needed. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Daryna Ishchenko (darynaishchenko) · 2026-08-21T10:39:30Z

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Daryna Ishchenko (darynaishchenko) · 2026-08-21T10:43:44Z

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Daryna Ishchenko (darynaishchenko) · 2026-08-21T10:55:22Z

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In
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- Around line 27-29: Update the _INLINE_VALUE pattern to accept an optional “- ”
sequence-item prefix, and revise the adjacent comment to document that
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airbyte_cdk/sources/declarative/requesters/error_handlers/backoff_strategies/wait_until_time_from_header_backoff_strategy.py
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CodeRabbit was right that excluding list items left a hole, and the comment justifying the exclusion was wrong. The 125 false positives it cited came from reading `- key: value` as one scalar; capturing only the value, as `key: value` already did, reports none. That form is now scanned for both hazards. Bare sequence scalars (`- some text`) are scanned too, but for `" #"` only. A `": "` there does not truncate anything -- it makes the item a one-key mapping, which parses -- and telling that apart from the nested mappings the file legitimately writes that way is not possible from the text. Mutation-tested: `" #"` on a description, a title, an unquoted `- key: value` and a bare sequence item each fail the guard, as does an unquoted `": "` in a description; the untouched file passes. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Pins airbyte-cdk 7.28.0.post4.dev32473979054, the prerelease of airbytehq/airbyte-python-cdk#1126, so the wait cap stops costing token rotation: HttpClient now asks the authenticator for a spare credential before a backoff strategy can refuse to wait. test_short_wait_budget_does_not_cost_token_rotation was xfail(strict) against 7.28.0 and xpassed on this build, which turned the suite red and is what removed the marker. It now runs as an ordinary test and is the end-to-end proof of the fix: 30-minute budget, 60-minute reset, two tokens, rotates in 1.1s instead of ending the stream. This pin must not merge. It is a dev build, and the connector is certified with progressive rollout enabled — repin to the release that ships #1126 before this PR goes in. TODO recorded in pyproject.toml next to the pin. Suite: 226 passed. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

…euse the client helper Four items from an external review of c8a491e. The abstract `BackoffStrategy.backoff_time` docstring is the one every custom strategy subclasses, and it still promised the method is called for every retryable response -- via a `should_backoff()` that has not existed in this package for some time. It now states that the client skips the strategies when a rate-limited response can be retried on another credential, and that implementations must not rely on being called for side effects. The two concrete carve-outs read as elaborations of it rather than as the only notice. The two schema descriptions render as the field's help text in the Connector Builder, where two sentences about a mechanism no connector uses yet roughly doubled the tooltip. Trimmed to one clause; the full explanation stays in the class docstrings, which have the right audience. The four rotation tests each rebuilt the client that `_rate_limited_client()` already builds forty lines above. It takes a `backoff_strategy` now, which drops 65 lines with the same coverage -- still 3 of them failing against main's `http_client.py`, verified after the refactor. Recorded rather than fixed: the punctuation scan is line-anchored, so a plain scalar wrapped onto a continuation line is only checked on its first line. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Anatolii Yatsuk (tolik0)

Approve. Non-breaking, and the core change is correct — this is the fix for the interaction I flagged as a design note on #1123 ("the cap raise pre-empts _can_retry_on_another_token, so a multi-token pool dies on a window it never needed to wait out").

Round 2 review of 1635fb86 (round 1 was c8a491e4).

Verified rather than read

The bug reproduces. In a worktree at the PR head with only http_client.py reverted to origin/main, three of the four rotation tests fail — test_rotation_is_preferred_over_a_strategy_that_refuses_to_wait, ..._over_the_real_capped_strategy, ..._also_covers_a_rate_limit_with_no_computed_wait — and all five pass with the PR's file restored. Re-ran after the _rate_limited_client refactor: identical, so the −65 lines cost no coverage.
Blast radius is nil for anyone who has not opted in. _can_retry_on_another_token short-circuits on isinstance(authenticator, TokenRotatingAuthenticator), so every other connector reaches the else: branch, which is the pre-PR loop verbatim. And grep -rl RateLimitedMultipleTokenAuthenticator airbyte-integrations/connectors/ in the monorepo returns nothing — the only consumer is the still-open #81428.
No hammer-loop risk from TOKEN_ROTATION_BACKOFF = 0.1. has_alternative_token answers True only when the sending token is tracked with remaining == 0 and another has quota; in exactly that state _acquire_call's final else advances _tokens_iter, and _send re-signs on every retry. The prompt retry is on a different credential by construction.
Generated model is in sync with the YAML by exact string containment, and no comparison operator changed — >= in _capped is already main's behaviour from #1123, so the description edits are documentation catching up.
The widened YAML guard works. I mutation-tested it independently of the commit message: five hazard forms each fail the guard (": " and " #" on a plain key, both on a - key: value, and " #" on a bare sequence item), the documented ": "-on-a-bare-item carve-out is correctly not flagged, and the untouched file passes.
Local suites: 757 passed / 5 failed + 1 error across streams/http, declarative/auth, error_handlers and the new schema test — the same six names on an origin/main worktree, the known macOS requests_cache artefact. Byte-identical to round 1.

Round 2 closed four round-1 items, and one further than asked

The base-contract docstring, the widened title and rewritten body, the trimmed Builder tooltip, and the _rate_limited_client reuse are all done. The should_backoff() the old docstring referenced genuinely does not exist anywhere in the package — good incidental catch. And taking CodeRabbit's regex, then finding the gap it left, then mutation-testing the result is the right way to handle a bot finding.

Open — none blocking

Three inline comments: one P2 false positive introduced by the guard widening (one-keyword fix, verified), and two P3s.

Caveat on CI

All five Pytest jobs were pending when I looked. They were green on round 1's head and the round-2 delta is docstrings plus test-only code that I ran locally, but CI has not confirmed this head. Check: source-shopify is also pending; destination-motherduck is red on 6 of 6 open PRs, so pre-existing; source-google-drive is skipped, not passed. None of the six Test Connectors exercises rotation or a wait cap, so that matrix proves only that the untouched branch did not regress — the real validation is a /prerelease pinned onto #81428, whose test_short_wait_budget_does_not_cost_token_rotation is an xfail(strict) tripwire.

@tolik0

…values The quoted-value exit used `continue`, which settles the scan but not the line: `- key: 'text # hash'` was skipped by the first scan, then re-captured whole by the bare-sequence-scalar scan, quotes and all, and reported as an offender. The assertion then told an author who had already quoted the value to quote it. `break` instead, since whichever scan reads a line first settles it. Verified against an inserted probe line: both quoted forms under a sequence key now pass where they previously failed, and every true positive still fails the guard -- `" #"` on a description, a title, an unquoted `- key: value` and a bare sequence item, plus the `": "` cases. Also reworded the module docstring, which claimed nothing asserted the schema parses nine lines above noting that 194 failures did. The 194 were an assertion, at the wrong layer with unreadable output; what the guards add is a named failure, not coverage. Reported by @tolik0. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

…is built A cap the manifest got wrong -- an interpolation over a config key the spec does not expose, a value resolving to NaN, a blank string -- was only discovered when a strategy was asked for a wait. Since rotation is now decided before the strategies run, that question may never be asked: while a spare credential has quota the cap is neither applied nor reported, and the broken expression resurfaces at whichever later rate limit finds every credential spent. Both capped strategies now resolve the field in `__post_init__`. `config` is a dataclass field and the cap interpolates over `config` alone, so the value is knowable as soon as the component exists, and the factory already passes the real config. A manifest mistake fails at startup, on every path. The nine tests that pinned the old timing assert construction now, which is the contract change this carries: the error is still an `AirbyteTracedException` with `system_error`, still never a raw jinja or float error, still the connector's fault rather than the user's -- only the moment moves. Fleet impact is nil today. Every user of the field resolves cleanly: source-github guards with `config.get(...) is not none`, source-klaviyo passes a float, source-granola hardcodes 60. The lazy check stays, so a strategy constructed directly in Python is unchanged. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Replaces the prerelease pin with the release that ships airbytehq/airbyte-python-cdk#1126, merged and published today. No dev build left, so the PR is no longer blocked on an unreleased dependency. 7.28.1 also resolves max_waiting_time_in_seconds at construction, which landed with the same PR: an expression this manifest got wrong now fails at startup instead of at whichever rate limit reaches the strategy first. The cap here interpolates through config.get with a literal fallback, so it resolves on every config. Manifest version declaration bumped to match. Suite: 226 passed, including test_short_wait_budget_does_not_cost_token_rotation, which needed this release to pass. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Daryna Ishchenko (darynaishchenko) marked this pull request as ready for review August 21, 2026 09:52

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Daryna Ishchenko (darynaishchenko) changed the title ~~fix(http): decide token rotation before a backoff strategy can refuse to wait~~ fix(http): decide token rotation before a backoff strategy can refuse to wait, and for rate limits with no computed wait Aug 21, 2026

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feat(connectors/source/github): Step 2 - auth, repository expansion, and Repositories stream airbytehq/airbyte#81428

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Daryna Ishchenko (darynaishchenko) merged commit 6871cda into main Aug 21, 2026
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Daryna Ishchenko (darynaishchenko) deleted the fix/rotate-before-wait-cap branch August 21, 2026 13:35

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Verified rather than read

Round 2 closed four round-1 items, and one further than asked

Open — none blocking

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