Trading Card Analysis & eBay Listing Specialist

Trading card analysis, grading guidance, market comps, and eBay listing optimization for sports cards, Pokémon, and other collectible cards. Use when evaluat...

Security Scan

The skill's requirements, optional credentials, and runtime instructions are consistent with a trading-card analysis and eBay-listing assistant; it is an instruction-only package that relies on host-provided integrations for any live eBay/PSA or ML functionality.

Purpose & Capability

The name and description match what the package requests and contains: listing templates, grading strategy, market-research methodology, and optional eBay/PSA env vars. A minor note: many references include code-like snippets (image analysis, ML grade prediction, market scraping) but the package explicitly states it does not include client implementations or models — these snippets are illustrative and require host-side code or integrations to function.

Instruction Scope

SKILL.md keeps scope limited to card ID, valuation heuristics, listing copy, and optional enrichment via configured integrations. It explicitly forbids asking users to store secrets in package dotfiles and instructs conservative behavior. The references mention multi-platform data collection and social sentiment sources (forums, Twitter, Reddit); these imply scraping/data collection only if a host integration implements them. That capability is not present in the package itself, so the instructions are appropriately cautious but could be misused if a host implementation added broad scraping without consent.

Install Mechanism

Instruction-only package with no install spec and no bundled binaries or code to write to disk. Lowest-risk install posture.

Credentials

No required environment variables; optional env vars (EBAY_* and PSA_API_KEY) are directly relevant and proportional to the described optional integrations. The package also explicitly recommends runtime env vars or host secret management and forbids storing secrets in the package.

Persistence & Privilege

Does not request always:true or any elevated persistence. The skill is user-invocable, and the package contains only documentation and templates that do not modify other skills or system configuration.

Assessment

This skill is internally consistent and low-risk as shipped (documentation and templates only). Before enabling any live integrations: 1) Verify your host provides approved eBay/PSA clients or connectors — the skill does not include API clients or ML models. 2) Keep credentials in your environment/secret manager (do not paste them into files); the skill explicitly recommends this. 3) Review any host-side implementation that would perform scraping or automated marketplace actions — the docs mention social-media sources and multi-platform data collection but the package does not implement these; ensure any such behavior complies with terms of service and privacy rules. 4) When using listing templates, avoid making factual claims you can't substantiate (e.g., 'Top Rated Seller', specific feedback counts, guaranteed shipping terms) unless you actually meet those criteria. If you want a stricter safety check, ask the host integrator to show the exact eBay/PSA connector code or the ML image-processing model that will be used with this skill.

Trading Card Specialist v2.0.4

Provide trading card analysis and listing support with a conservative trust posture.

Core workflow

1. Identify the card: year, brand, set, player/character, card number, variation, grading status, and visible condition.
2. Decide the operating mode:
   • No-credential mode: use user-provided details, attached images, and general heuristics.
   • eBay mode: use configured eBay credentials for market comps and listing research.
   • PSA mode: use configured PSA credentials for population or cert lookup.
3. Produce the smallest useful output:
   • value range
   • grading recommendation
   • optimized eBay title
   • concise sales description
   • notes on what still needs verification
4. Do not claim live market or population data unless those integrations are actually configured and queried.

Operating modes

1) No-credential mode

Use this by default when credentials are unavailable.

Available tasks:

• card identification help
• listing title/description generation
• pricing heuristics based on user-supplied comps
• grading decision framework
• photo and presentation recommendations

2) Optional eBay enrichment

Use only when eBay credentials are configured and the host environment provides a real eBay integration workflow.

Supported use cases:

• sold listing comparisons
• active listing positioning
• title keyword refinement
• category and listing structure guidance

3) Optional PSA enrichment

Use only when PSA_API_KEY is configured and the host environment provides a real PSA integration workflow.

Supported use cases:

• certification verification workflows
• population-aware grading context
• scarcity framing for listings

Credentials

Treat integrations as optional unless the task specifically requires live external data.

Optional environment variables

• EBAY_APP_ID
• EBAY_CERT_ID
• EBAY_DEV_ID
• EBAY_USER_TOKEN
• PSA_API_KEY

Do not ask users to create home-directory credential files. Prefer runtime environment variables or the host's secret management.

Read CREDENTIALS.md only when the user needs integration setup. This package does not include bundled live eBay or PSA client implementations.

Output guidelines

Card analysis

Return:

• card summary
• condition estimate with confidence qualifier
• estimated value range
• notable risks or missing information
• grading recommendation

eBay listing output

Use the bundled template in assets/ebay-listing-template.md when generating listing copy.

Prefer:

• concise SEO title
• factual description
• no unverifiable hype
• clear disclosure of flaws, centering, edges, corners, and surface issues when known

Grading guidance

Consider:

• raw vs graded spread
• likely grade band, not false precision
• grading fees, shipping, insurance, and turnaround time
• whether the card benefits from slab trust or liquidity

Read references/GRADING-STRATEGY.md when grading ROI is central.

References

Load only as needed:

• references/LISTING-OPTIMIZATION.md — title, description, and listing structure
• references/MARKET-RESEARCH.md — comp gathering and pricing workflow
• references/GRADING-STRATEGY.md — grading ROI and service selection
• references/INTEGRATIONS.md — optional eBay / PSA integration details
• references/SECURITY.md — credential handling and compliance notes

Safety and trust rules

• Never imply credentials are required for basic use.
• Never store secrets inside the skill package.
• Never instruct users to put secrets in dotfiles under their home directory.
• Never claim automated posting, bidding, or other marketplace actions unless explicitly implemented and approved.
• Prefer official APIs over scraping.
• Keep outputs factual; avoid invented sales, ROI, or profit claims.