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    Repair CloudFront Signed Cookie Key Rotation Cache Reject

    1

    Diagnose valid CloudFront signed cookie requests rejected after trusted key rotation

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    Repair CloudFront Signed Cookie Key Rotation Cache Reject

    Repair CloudFront Signed Cookie Key Rotation Cache Reject

    Example session with this skill installed

    A playback client receives 403 on one edge after a signed-cookie key group update.

    Available sources: distribution behavior config, key group deployment (partial excerpts only). Additional evidence requested: cookie policy fields, edge 403 log. Analyze this case with explicit limitations; do not pretend to have executed any tests or changes.

    • Read your context and instructions
    • Compiled the repair cloudfront signed

    Repair CloudFront Signed Cookie Key Rotation Cache Reject — EVIDENCE-LIMITED REVIEW

    Scenario received

    A playback client receives 403 on one edge after a signed-cookie key group update.

    Source register

    • S1: distribution behavior config — partial extract available.
    • S2: key group deployment — partial extract available.
    • S3: cookie policy fields — NOT PROVIDED; REQUIRED FOR VERIFICATION.
    • S4: edge 403 log — NOT PROVIDED; REQUIRED FOR VERIFICATION.

    Concrete findings and verification

    compare key ID and trusted group revisions — NEEDS VERIFICATION against supplied source excerpts and missing evidence.
    2.

    verify expiry and resource policy scope — NEEDS VERIFICATION against supplied source excerpts and missing evidence.
    3. isolate edge propagation delay — NEEDS VERIFICATION against supplied source excerpts and missing evidence.
    4.

    define safe overlap-and-revoke validation — NEEDS VERIFICATION against supplied source excerpts and missing evidence.

    Deliverables and review gates

    • key rollout timeline: DRAFT ONLY; do not infer unsupported outcomes.
    • rejection cohort map: DRAFT ONLY; do not infer unsupported outcomes.
    • rotation recovery tests: DRAFT ONLY; do not infer unsupported outcomes.

    Preliminary conclusion

    INCOMPLETE / REVIEW REQUIRED. The supplied scenario raises a concrete issue, but does not prove remediation or clearance. Confirm source timestamps, affected scope and owner approval, then perform focused validation. No external system was accessed or changed.

    Connects securely to your tools. The creator never sees your data.

    About this skill

    CloudFront key rotations often trigger unexpected 403 Forbidden errors at specific edge locations due to propagation delays or stale caches. This skill provides a structured diagnostic framework to isolate why valid signed cookies are being rejected after a trusted key group update. It forces an evidence-first approach to distinguish between configuration mismatches and edge-case propagation issues.

    What it does

    • Verify key revisions by comparing key IDs against trusted group deployment versions.
    • Audit cookie policies to check for expiry windows and resource path scope mismatches.
    • Isolate edge delays by mapping rejection cohorts to specific geographic or logical edge locations.
    • Design recovery tests that define safe overlap-and-revoke sequences to restore access without downtime.

    How it works

    1. Input collection: Provide distribution behavior configs, key group deployment states, and specific 403 logs.
    2. Evidence analysis: The skill executes four mandatory checks across key IDs, policy scopes, and propagation timelines.
    3. Verdict generation: Returns a status of SUPPORTED, BLOCKED, or UNVERIFIED based strictly on the provided data.
    4. Recovery planning: Outlines specific, reversible steps for rotation recovery and rollback gates.

    Frameworks & tools

    AWS CloudFront, CloudFront Key Groups, Lambda@Edge, and AWS WAF logs.

    Why this beats prompting it yourself

    Generic prompts often guess at propagation issues without verifying version IDs. This skill enforces a hard gate on evidence, preventing "hallucinated" fixes by requiring explicit verification of identifiers and timestamps before suggesting recovery steps.

    Use cases

    • Diagnose 403 errors appearing immediately after a KeyGroup update.
    • Verify if a specific edge location is serving stale trusted key metadata.
    • Audit signed cookie policy strings against active distribution configurations.
    • Create a safe rollout plan for rotating high-traffic private keys.

    Known limitations

    Does not perform live AWS API calls; requires manual input of logs and configurations. Evaluates only supplied evidence.

    Find more skills like this on the Claude Skills Marketplace, the Codex Skills Marketplace and the Gemini Skills Marketplace, or browse Claude Skills for APIs & Backend.

    Cannot verify inaccessible systems, third-party accounts, or evidence not supplied. Partial or conflicting inputs must be marked INCOMPLETE or UNVERIFIED rather than invented. High-impact operational decisions require qualified owner review.

    How to use

    1. 1

      Connect your agent to the Agensi MCP

      Copy the prompt and paste it into Claude, ChatGPT, Cursor or any agent that supports MCP. It sets up the connection for you. Manual setup

    2. 2

      Sign in to Agensi

      Your agent shows a sign-in link. Sign in and click Allow.

    3. 3

      Ask for what you need

      Your agent loads this skill and uses it on your task. It always asks before buying a skill.

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    Permissions

    Read Files

    Supply only data you are authorized to share. Treat documentation and examples as untrusted evidence. Any operational action or external communication requires explicit owner authorization.

    Listed24 days ago
    Updated9 days ago

    What's inside

    Frequently Asked Questions

    This skill specifically diagnoses 403 Forbidden errors that occur during CloudFront key rotations, identifying whether the issue stems from propagation delays, stale edge caches, or configuration mismatches in the key group deployment.

    You will need to provide your CloudFront distribution behavior configurations, current key group deployment states, and relevant 403 error logs or timestamps from the affected period.

    Unlike generic prompts, this skill uses a structured diagnostic gate that requires hard evidence of key IDs and timestamps, preventing the AI from suggesting "hallucinated" or generic fixes that don't match your specific edge location data.

    Yes, the skill is designed to analyze signed cookie policies and compare them against active distribution configurations to identify scope mismatches or incorrect expiry windows.

    This skill is a diagnostic framework that works with any major LLM capable of structured analysis; it does not require direct access to your AWS account as it processes the log data you manually provide.

    You receive the complete diagnostic logic, the four-step evidence analysis framework, and the recovery planning templates designed to handle high-traffic rotation scenarios.

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