feat: add Pendle Finance action provider

[Kubudak90]

Summary

Adds a new action provider for Pendle Finance on Base, enabling AI agents to interact with Pendle's yield tokenization protocol.

Addresses WISHLIST.md item: "Pendle interactions (LP, PT, YT)"

Actions

Action	Description
buy_pt	Buy Principal Tokens to lock in fixed yield
sell_pt	Sell PT back to underlying tokens
buy_yt	Buy Yield Tokens to speculate on yield
sell_yt	Sell YT back to underlying tokens
add_liquidity	Provide liquidity to earn fees + PENDLE rewards
remove_liquidity	Remove liquidity back to a single token
claim_rewards	Claim accrued interest, yield, and rewards
list_markets	List active markets with APYs, TVL, maturity

Implementation Details

• Uses Pendle Hosted SDK API (api-v2.pendle.finance) for optimal execution — aggregator routing, limit order matching, gas-efficient offchain params
• Direct Router V4 (0x888...946) call for claim_rewards via redeemDueInterestAndRewards
• Supports Base mainnet (chain ID 8453)
• Follows existing action provider patterns (Morpho, Moonwell)

Files

File	Description
pendle/pendleActionProvider.ts	Main provider with 8 actions
pendle/schemas.ts	Zod input schemas for all actions
pendle/constants.ts	Router V4 address, ABI, API base URL
pendle/pendleActionProvider.test.ts	10 unit tests (all passing)
pendle/index.ts	Re-exports

Test plan

• pnpm run build passes
• 10/10 unit tests pass (supportsNetwork, buyPt, sellPt, addLiquidity, claimRewards, listMarkets)
• Manual: configure agentkit with Base wallet, call list_markets, then buy_pt on an active market

[cb-heimdall]

🟡 Heimdall Review Status

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